Running IIS and Apache on same server?

[kwickcut]

I am new to running php mysql and apache with IIS server so i am haveing some trouble. The server that i am running now is win2k advanced server with a 1.33 AMD with 1gig ram and one 120 gig hd and one 80 gig hd. Both the ISS server and php apache and mysql are all on the same hd. As of now i am hosting my tae kwon do site and a few friends sites useing IIS. I am in need of running vbulliten and reguler sites as well. The problem that i am haveing is that when i run apache i loose my ISS server as they both want port 80 i am assumeing.. Is there a work around for this without starting another server? i have read that you can run small sites with Apache but my site is over 3000 pages and i think that may be to big. thanks for any advice in this matter

kwick