In case you are using custom file extensions for languages that Visual Assist already knows, f. ex. .xul which is normal XML, you can tell VA how to treat that file type.
Therefor you need to change some values in your registry. All VA options can be found at:
HKEY_CURRENT_USER\\Software\\Whole Tomato\\Visual Assist X\
Find the folder that represents your Visual Studio version ((VANet8, VANet9, etc.) and add your
extensions to the registry entries that start with Ext.
For the XUL-example, it could look like this:
"ExtXml"=".xml;.xul;"
Cheers!
p.s. *arg* maybe this is the wrong forum for this. @moderators: move this thread wherever it suits you best :)