Added warning to use only Inno Setup v5, not v6

v6 fails to compile the setup script because it doesn't support compiling for Windows 2000 or XE. CodeSnip still targets these OSs

Author: delphidabbler

Build.html

@@ -222,8 +222,15 @@ <h3>
 </h3>
 
 <p>
-  The Unicode version of the Inno setup command line compiler is needed to
-  create <em>CodeSnip</em>'s install program. v5.5.2(u) or later is required.
+  The Unicode version of the Inno Setup <strong>v5</strong> command line
+	compiler is needed to create <em>CodeSnip</em>'s install program. v5.5.2(u) or
+	later is required.
+</p>
+
+<p class="note">
+	<strong>Warning:</strong> Do not use Inno Setup v6. This will fail to compile
+	the setup script. Inno Setup 6 does not support Windows 2000 or XE, while 
+	<em>CodeSnip</em> still does.
 </p>
 
 <p>