I did just as you said, and I got the 2.5 installer and it works just fine, so its obviously not a problem with MSI, however both the amd64 link and the ia64 link tell me "This installation package is not supported by this processor type. Contact your product vendor." when I run them. My processor type is most definately a dualcore amd, I just built it a year ago and I even have the box in my closet, so I know I should be using the amd one, but it tells me the aforementioned error.
Good news, with just the basic 2.5 python installed, I apparently dont need to download anything else to make it work for my machine, cause I just ran a test game with 20 AI's, and I got attacked first thing, so apparently just the basic python thingie was all I needed afterall and not a particualr new thing. Perhaps its my own lack of scripting knowledge that gave me a roadblock in this issue, sorry if I wasted your time. But all seems to work fine now lets hope it stays that way.
For future reference, even though I have amd for my pc, I downloaded 2.5.4 for x86, and it made the AI work properly. It is the first of the three links for windows users on this page.
http://python.org/download/releases/2.5.4/
Thanks again for helping me, I am happy to help test in any way I can and give good feedback as payment for my annoying problems ^^