I have a similar problem in that I never use Ultimate.cgi because my site only has one forum and thus I link directly to forumdisplay.cgi bypassing Ultimate.cgi completely.
Basically this is what my cookies question was about, how do I get cookies to read from the forumdisplay.cgi file instead of the Ultimate.cgi file?
I was thinking about simply pasting the 'sub intro {' code out of Ultimate.cgi into the forumdisplay.cgi file and then adding the &intro call to the forum calling URL, however I haven't had the chance to test this yet so I don't know if it actually works.
My next problem would be as you guys do in that I want to make CYMPM work directly from the forumdisplay.cgi file instead of the Ultimate.cgi file, if anybody knows how to do this then you could save me a lot of time trying, but if not then I'll give it a go and post it here afterwards. Let me know?