Rewriting arguments in htaccess

[eluser]Unknown[/eluser]
Hi all,

I succesfully managed to remove index.php, and my next challenge are arguments in a PHP url.

This is what happens now:

about.php is rewritten to home/about using htaccess rewrite rules.

What I want now is the following:

about.php?herp to home/about/herp

I know that a simple Rewrile rule wont do it since the arguments are not passed. I heard something about rewriteCond but I dont see how this is applied exactly...

Thanks a bunch