Ok, I went and did a search on google for "changing mimtypes windows 2000" and got nothin for results. So I went into Windows File-Types settings and went searching for PHP. It wasnt in there, so I created it and pointed it at the php.exe file, just to test. Didn't solve anything.
Not sure if it'll help, but here's a page with a couple of links to the files im talking about.
http://stakk.boldlygoingnowhere.org:8080/somelinksforyoumylove.html - might be down, it's just a test server but i'll try and keep it up.
Thanks for the quick reply though.
[edit]I forgot to mention before, i can run the files if i drop them directly into the htdoc directory, but they cant be in the folder like they are now (to say theres no problems with the code/files). This is bizarre, i know.
[edit2]There's a fish now.