Update download_manager.htm

pages/download_manager.htm

@@ -170,7 +170,7 @@ <h2 style="margin:0;">Black Mesa - Original release (2012)</h2>
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-        Please select a download mirror to begin your download.<br>Some mirrors that host the original 2012 version are no longer available or instead gives you wrong file.<br><br><br> <!-- Most mirrors have been removed because they have been shutdown or redirected into another page. -->
+        Please select a download mirror to begin your download.<br>Some mirrors that host the original 2012 version are no longer available or instead gives you wrong file.<br><b>NOTE:</b> (For Chip.de links) Click on <b>Manuelle Installation</b> > Select <b>Download-Server CHIP Online</b> > then <b>Download</b><br>(For ModDB links) Scroll down, and download two zips file (Black Mesa Part 1.zip and Black Mesa Part 2.zip), after download, rename<br>both to <code>blackmesa.zip.001</code> and <code>blackmesa.zip.002</code> respectively and extract<br>the blackmesa.zip.001 to the <code>sourcemods</code> folder (both will be extracted automatically) <br><br> <!-- Most mirrors have been removed because they have been shutdown or redirected into another page. -->
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