Sorry, I assumed that you were using .htaccess for the directives (which you should, for ease of portability).
Redirections within the server configuration file require that paths be absolute. Directory configuration, on the other hand, allows relative paths.
As a side note, I'd only glanced over your first post. What you're trying to do (encapsulate all URL requests) is extremely difficult to manage. Optimally, instead of hiding the user request from the script, it should be supporting its own URL format specification (as it is currently, but with the ugly URLs).
Nevertheless, it is possible to implement a limited redirect sequence.
RewriteEngine onRewriteRule ^/forum/(.*)$ /cgi-bin/Fleurin.cgi?P=Thread&T=$1 [QSA,NC]# Should be caught in the dispatcher (change the last rule's plus sign to an asterisk).RewriteRule ^/$ /cgi-bin/Fleurin.cgi?P=Home# Rather than explicitly setting each requestable page, allow the script to determine the request validity.RewriteRule ^/([^.]+)$ /cgi-bin/Fleurin.cgi?P=$1 [QSA,L]