diff --git a/File_Renaming_Current.m b/File_Renaming_Current.m
new file mode 100644
index 0000000..a78f01b
--- /dev/null
+++ b/File_Renaming_Current.m
@@ -0,0 +1,101 @@
+%% Replace a substring in all files in a directory or all subdirectories
+% Created - Alex Salmon - 2019.02.27
+% Not yet approved for AOIP use. Last validated: yyyy.mm.dd
+
+%% Imports
+addpath('.\lib');
+
+%% Get user input
+prompt            = {'Desired directory path:',...
+                     'Old string:',...
+                     'New string:',...
+                     'Search subfolders? (y/n)'};
+dialog_name       =  'Replace a substring in all files';
+defaults          = {'','','','n'};
+opts.Resize       = 'on';
+
+%% Loop until input is valid
+input_valid = false;
+while ~input_valid
+    answers = inputdlg(prompt, dialog_name, 1, defaults, opts);
+    if exist('mb', 'var') % Close message box
+        close(mb);
+    end
+    if isempty(answers) % Cancel
+        return;
+    end
+    
+    % Reset error_found
+    error_found = false;
+    % Update defaults for quick fixes
+    defaults = answers;
+
+    % unpackaging input data
+    warning_msg = '';
+    root_dir            = answers{1};
+    if exist(root_dir, 'dir') == 0
+        warning_msg = 'Directory not found';
+        error_found = true;
+    end
+    string_to_replace   = answers{2};
+    desired_string      = answers{3};
+    include_subdirs     = strtrim(answers{4});
+
+    if ~error_found
+        %% Search for files
+        search = fullfile(root_dir, sprintf('*%s*', string_to_replace));
+        if strcmpi(include_subdirs, 'y')
+            f_list = subdir(search);
+            % subdir outputs name as the ffname, fix that for the next step
+            for ii=1:numel(f_list)
+                [~,name,ext] = fileparts(f_list(ii).name);
+                f_list(ii).name = [name,ext];
+            end
+        elseif strcmpi(include_subdirs, 'n')
+            f_list = dir(search);
+        else
+            warning_msg = 'Input not recognized';
+            error_found = true;
+        end
+        % Check if search comes up empty
+        if isempty(f_list)
+            warning_msg = 'No files found with specified substring';
+            error_found = true;
+        end
+    end
+    
+    %% Validate input
+    if ~error_found
+        input_valid = true;
+    else
+        mb = msgbox(warning_msg, 'Error', 'Error');
+    end
+end
+
+%% Waitbar
+wb = waitbar(0, sprintf('Replacing substring "%s" as "%s"', ...
+    string_to_replace, desired_string));
+wb.Children.Title.Interpreter = 'none';
+
+%% Rename files
+for ii=1:numel(f_list)
+    in_name     = f_list(ii).name;
+    out_name    = strrep(in_name, string_to_replace, desired_string);
+    in_ffname   = fullfile(f_list(ii).folder, in_name);
+    out_ffname  = fullfile(f_list(ii).folder, out_name);
+    % Rename w/ cmd line
+    eval(sprintf('! ren "%s" "%s"', in_ffname, out_name));
+    waitbar(ii/numel(f_list), wb)
+end
+
+%% Done
+close(wb)
+
+
+
+
+
+
+
+
+
diff --git a/lib/grid_template/FileNames.xlsx b/lib/grid_template/FileNames.xlsx
new file mode 100644
index 0000000..c953c78
Binary files /dev/null and b/lib/grid_template/FileNames.xlsx differ
diff --git a/lib/subdir.m b/lib/subdir.m
new file mode 100644
index 0000000..d177683
--- /dev/null
+++ b/lib/subdir.m
@@ -0,0 +1,151 @@
+function varargout = subdir(varargin)
+%SUBDIR Performs a recursive file search
+%
+% subdir
+% subdir(name)
+% files = subdir(...)
+%
+% This function performs a recursive file search.  The input and output
+% format is identical to the dir function.
+%
+% Input variables:
+%
+%   name:   pathname or filename for search, can be absolute or relative
+%           and wildcards (*) are allowed.  If ommitted, the files in the
+%           current working directory and its child folders are returned    
+%
+% Output variables:
+%
+%   files:  m x 1 structure with the following fields:
+%           name:   full filename
+%           date:   modification date timestamp
+%           bytes:  number of bytes allocated to the file
+%           isdir:  1 if name is a directory; 0 if no
+%
+% Example:
+%
+%   >> a = subdir(fullfile(matlabroot, 'toolbox', 'matlab', '*.mat'))
+%
+%   a = 
+%
+%   67x1 struct array with fields:
+%       name
+%       date
+%       bytes
+%       isdir
+%
+%   >> a(2)
+%
+%   ans = 
+%
+%        name: '/Applications/MATLAB73/toolbox/matlab/audiovideo/chirp.mat'
+%        date: '14-Mar-2004 07:31:48'
+%       bytes: 25276
+%       isdir: 0
+%
+% See also:
+%
+%   dir
+
+% Copyright 2006 Kelly Kearney
+
+
+%---------------------------
+% Get folder and filter
+%---------------------------
+
+narginchk(0,1);
+nargoutchk(0,1);
+
+if nargin == 0
+    folder = pwd;
+    filter = '*';
+else
+    [folder, name, ext] = fileparts(varargin{1});
+    if isempty(folder)
+        folder = pwd;
+    end
+    if isempty(ext)
+        if isdir(fullfile(folder, name))
+            folder = fullfile(folder, name);
+            filter = '*';
+        else
+            filter = [name ext];
+        end
+    else
+        filter = [name ext];
+    end
+    if ~isdir(folder)
+        error('Folder (%s) not found', folder);
+    end
+end
+
+%---------------------------
+% Search all folders
+%---------------------------
+
+pathstr = genpath_local(folder);
+pathfolders = regexp(pathstr, pathsep, 'split');  % Same as strsplit without the error checking
+pathfolders = pathfolders(~cellfun('isempty', pathfolders));  % Remove any empty cells
+
+Files = [];
+pathandfilt = fullfile(pathfolders, filter);
+for ifolder = 1:length(pathandfilt)
+    NewFiles = dir(pathandfilt{ifolder});
+    if ~isempty(NewFiles)
+        fullnames = cellfun(@(a) fullfile(pathfolders{ifolder}, a), {NewFiles.name}, 'UniformOutput', false); 
+        [NewFiles.name] = deal(fullnames{:});
+        Files = [Files; NewFiles];
+    end
+end
+
+%---------------------------
+% Prune . and ..
+%---------------------------
+
+if ~isempty(Files)
+    [~, ~, tail] = cellfun(@fileparts, {Files(:).name}, 'UniformOutput', false);
+    dottest = cellfun(@(x) isempty(regexp(x, '\.+(\w+$)', 'once')), tail);
+    Files(dottest & [Files(:).isdir]) = [];
+end
+
+%---------------------------
+% Output
+%---------------------------
+    
+if nargout == 0
+    if ~isempty(Files)
+        fprintf('\n');
+        fprintf('%s\n', Files.name);
+        fprintf('\n');
+    end
+elseif nargout == 1
+    varargout{1} = Files;
+end
+
+
+function [p] = genpath_local(d)
+% Modified genpath that doesn't ignore:
+%     - Folders named 'private'
+%     - MATLAB class folders (folder name starts with '@')
+%     - MATLAB package folders (folder name starts with '+')
+
+files = dir(d);
+if isempty(files)
+  return
+end
+p = '';  % Initialize output
+
+% Add d to the path even if it is empty.
+p = [p d pathsep];
+
+% Set logical vector for subdirectory entries in d
+isdir = logical(cat(1,files.isdir));
+dirs = files(isdir);  % Select only directory entries from the current listing
+
+for i=1:length(dirs)
+   dirname = dirs(i).name;
+   if    ~strcmp( dirname,'.') && ~strcmp( dirname,'..')
+       p = [p genpath(fullfile(d,dirname))];  % Recursive calling of this function.
+   end
+end