Files prefixed with cp are Control Panel files; aka they aren't shown to users.
I haven't played with classic in quite a long while so I'm not too sure where to start offhand...
I believe classic should have a templates folder in the noncgi folder; that'd contain the "shown to browser" bits, then the cgi file would contain the "processing" bits; vars files are just for holding static variables, so that'd be where you'd put your recaptcha challange/response key's.
