haymaker, your best bet is to start looking around for CGI FAQs, and "common things that can go wrong". Your Apache CGI configuration is working correctly, since the test-cgi runs correctly. In this case, file extensions don't matter. You're probably running into one of the problems I described in my previous post.
A quick way to test if a script has the right line encoding, for example, is to open the script up in the terminal, and see what you see. If you do:
And see everything on one line, or else a lot of ^M's all over the place, then you've got incorrect line feeds that will need to be converted to Unix ones.