When it comes to rewriting url's there's really no difference between ASP and PHP. The actual rewrite dll is attached either to ISS or Apache. If you server is running on a windows machine then you will most lickely use something like IIS Rewrite from Qwerksoft or use Mod Rewrite.
The entire process is not as easy as one may think it is. If you do not have any programming experiance this should be done by a pro. If you need help PM me and i'll give you a quote.
Yep i think i installed it right but i think im tired as i couldnt even work out how to get it working so i posted a message over there. Kinda embarrasing lol but the example im posting is a typical url i use so any answer will sort it out :-)
god knows how long i will be spending redoing all the links in my sites lol, but well worth it!