OT mod_rewrite says goodbye to POST vars (but interesting)

Well, not being able to find much help on mod_rewrite, I hoped some guru here might be able to help me. I'm using mod rewrite to do a pretty simple redirect (or rewrite that it) to a php page that parses the original url and allows for the output of all sorts of content. Works great apart from the fact that the POST vars are lost along the way. And I believe the cookie vars too, but get seems to be ok. So, does anyone know how to do url redirection or rewriting or whatever that allows the post vars to be maintained? Please don't refer me to tim's article on phpbuilder on the subject as I've read every word twice and all the annotations to no avail. Many thanks as always. Matt Friedman Spry New Media