diff --git a/OutlookCOMM.COM/MailUtilities.cs b/OutlookCOMM.COM/MailUtilities.cs
index e0eaaa7..72100ce 100644
--- a/OutlookCOMM.COM/MailUtilities.cs
+++ b/OutlookCOMM.COM/MailUtilities.cs
@@ -8,36 +8,24 @@
 
 namespace OutlookCOMM.COM
 {
-    [Guid("69C85C8D-DBEB-4d85-83A7-7E5077AD11BA")]
-    [InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
-    public interface IOutlookCOMM
-    {
-        /// <summary>
-        /// Method which creates an EML file with passed information.
-        /// </summary>
-        /// <param name="from">The sender address of the mail</param>
-        /// <param name="to">The receiver address of the mail </param>
-        /// <param name="subject">The subject of the mail to send</param>
-        /// <param name="body">The body of the mail to send</param>
-        /// <param name="attachmentPath">The path of the attachment to add to the mail</param>
-        /// <param name="unsent">Set the X-Unsent property of the EML</param>
-        [DispId(1)] bool SaveEML(string from, string to, string cc, string bcc, string subject, string body, string attachmentPath, bool unsent, bool useOutlookAccount);
-    }
-    
-    [Guid("0C216A19-E1B7-4b05-86D3-4C516BDDC041")]
-    [ClassInterface(ClassInterfaceType.None)]
+    [ComVisible(true)]
+    [Guid("C79C6ABA-10F6-4DEA-B9AE-69DDB62C5881")]
+    [ClassInterface(ClassInterfaceType.AutoDual)]
     [ProgId("MailUtilities")]  
-    public class MailUtilities:IOutlookCOMM
+    public class MailUtilities
     {
         /// <summary>
         /// Method which creates an EML file with passed information.
         /// </summary>
         /// <param name="from">The sender address of the mail</param>
         /// <param name="to">The receiver address of the mail </param>
+        /// <param name="cc">The CC address of the mail</param>
+        /// <param name="bcc">The BCC address of the mail</param>
         /// <param name="subject">The subject of the mail to send</param>
         /// <param name="body">The body of the mail to send</param>
         /// <param name="attachmentPath">The path of the attachment to add to the mail</param>
         /// <param name="unsent">Set the X-Unsent property of the EML</param>
+        /// <param name="useOutlookAccount">If true uses the sender mail defined in Outlook otherwise uses from parameter</param>
         public bool SaveEML(string from, string to, string cc, string bcc, string subject, string body, string attachmentPath, bool unsent, bool useOutlookAccount)
         {
             string tempFolderPath = Path.Combine(Path.GetTempPath(), "OutlookCOMM");
diff --git a/OutlookCOMM.COM/OutlookCOMM.COM.csproj b/OutlookCOMM.COM/OutlookCOMM.COM.csproj
index 84fc316..cd058d9 100644
--- a/OutlookCOMM.COM/OutlookCOMM.COM.csproj
+++ b/OutlookCOMM.COM/OutlookCOMM.COM.csproj
@@ -43,6 +43,11 @@
     <Compile Include="MailUtilities.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="RegisterOCOMMInterface.ps1">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/OutlookCOMM.COM/RegisterOCOMMInterface.ps1 b/OutlookCOMM.COM/RegisterOCOMMInterface.ps1
new file mode 100644
index 0000000..7ab3c43
--- /dev/null
+++ b/OutlookCOMM.COM/RegisterOCOMMInterface.ps1
@@ -0,0 +1,58 @@
+# Stop execution when an error occurs
+$ErrorActionPreference = "Stop"
+
+# Detect if PowerShell has administrator privileges
+if (-NOT ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator"))
+{   
+	# Run the script with PowerShell with administrator privileges
+    $Script = $MyInvocation.MyCommand.Definition
+    $Ps = Join-Path $PSHome 'powershell.exe'
+    Start-Process $Ps -Verb runas -ArgumentList "& '$Script'"
+    exit(0)
+}
+else
+{
+    # Contains the path of regasm.exe
+    $RegAsmPath = "$($env:Windir)\Microsoft.NET\Framework\v2.0.50727\regasm.exe"
+    if (-not (Test-Path $RegAsmPath))
+    {
+        throw "regasm.exe not found in $RegAsmPath"
+    }
+
+    # Ask for [Install], [Remove] or [Abort]
+    $Options = [System.Management.Automation.Host.ChoiceDescription[]] @("&Install", "&Remove", "&Abort")
+    $Selection = $host.UI.PromptForChoice("Installer of OutlookCOMM for NAV Classic", "What do you want to do?", $Options, 0)
+    if ($Selection -eq 0 -or $Selection -eq 1)
+    {
+        # Create the folder OutlookCOMM in C:\ drive if it does not exists
+        $TargetFolder = "C:\OutlookCOMM"
+        if (-not [IO.Directory]::Exists($TargetFolder))
+        {
+            [IO.Directory]::CreateDirectory($TargetFolder) | Out-Null
+        }
+
+        # Copy OutlookCOMM files to $TargetFolder
+        Copy-Item "$PSScriptRoot\OutlookCOMM.COM.dll" -Destination "$TargetFolder" -Force
+        Copy-Item "$PSScriptRoot\OutlookCOMM.COM.tlb" -Destination "$TargetFolder" -Force
+    
+        # Create the [Install] command
+        $RegAsmArgs = ($("`"$TargetFolder\OutlookCOMM.COM.dll`""), "/tlb:`"$("$TargetFolder\OutlookCOMM.COM.tlb")`"", "/silent", "/codebase")
+
+        # If user selected [Remove] add /u (unregister) parameter (/unregister is not recognised sometimes)
+        if ($Selection -eq 1)
+        {
+            $RegAsmArgs = @("/u") + $RegAsmArgs
+
+			# Detect if finsql.exe is running (can't unregister until closed)
+            $FinsqlProcess = Get-Process finsql -ErrorAction SilentlyContinue
+            if($FinsqlProcess)
+            {
+                throw "Close all finsql.exe instances before removing OutlookCOMM"
+            }
+        }
+
+        # Run regasm.exe with passed parameters
+        & $RegAsmPath @RegAsmArgs
+    }
+    exit(0)
+}
\ No newline at end of file
diff --git a/OutlookCOMM.NET/MailUtilities.cs b/OutlookCOMM.NET/MailUtilities.cs
index 29591a5..b048ab3 100644
--- a/OutlookCOMM.NET/MailUtilities.cs
+++ b/OutlookCOMM.NET/MailUtilities.cs
@@ -14,10 +14,13 @@ public static class MailUtilities
         /// </summary>
         /// <param name="from">The sender address of the mail</param>
         /// <param name="to">The receiver address of the mail </param>
+        /// <param name="cc">The CC address of the mail</param>
+        /// <param name="bcc">The BCC address of the mail</param>
         /// <param name="subject">The subject of the mail to send</param>
         /// <param name="body">The body of the mail to send</param>
         /// <param name="attachmentPath">The path of the attachment to add to the mail</param>
         /// <param name="unsent">Set the X-Unsent property of the EML</param>
+        /// <param name="useOutlookAccount">If true uses the sender mail defined in Outlook otherwise uses from parameter</param>
         public static bool SaveEML(string from, string to, string cc, string bcc, string subject, string body, string attachmentPath, bool unsent, bool useOutlookAccount)
         {
             string tempFolderPath = Path.Combine(Path.GetTempPath(), "OutlookCOMM");
diff --git a/README.md b/README.md
index fdd3524..8e35def 100644
--- a/README.md
+++ b/README.md
@@ -18,21 +18,16 @@ OutlookCOMM is a component which can be used in Microsoft Dynamics NAV as a work
   2. Restart NAV service(s).
 
 * For NAV 2013:
-  1. Copy the OutlookCOMM.NET.dll into the Add-in folder placed inside both NAV service and RTC installation folders (the dll should be copied in every installed RTC - except for ClickOnce installations).
+  1. Copy the OutlookCOMM.NET.dll into the Add-in folder placed inside both NAV service and RTC installation folders (the dll should be copied in every installed RTC).
   2. Restart NAV service(s).
 
 * For NAV 2009R2 (RTC):
   1. Copy the OutlookCOMM.NET35.dll into the Add-in folder placed inside both NAV service and RTC installation folders (the dll should be copied in every installed RTC).
+  2. Restart NAV service(s).
 
 * For NAV 2009R2 Classic and previous versions:
-  1. Copy the OutlookCOMM.COM.dll into the Add-in folder placed inside NAV Classic installation folder (the dll should be copied in every installed client).
-  2. From a command prompt with administrator rights run the following commands (on both server and clients):
-
-
-  `cd C:\Windows\Microsoft.NET\Framework\v2.0.50727`
-
+  1. Run `RegisterOCOMMInterface.ps1` with PowerShell on every installed client.
 
-  `regasm pathOfDllFile /tlb pathOfTlbFile`
   
 ### Applying changes to NAV objects