Yea Thats Right, Iv Found a Way To Get FPSC x10 on windows xp.
Requirments Still Need An Direct x 10 graphic card so u still need that BUT follow these steps to get direct x10 installed on ur win xp
1ST download
this
Then Download
this
and then run dx10.exe to setup (post a reply if the font is all mucked up and is elegible cause i have a 1k font pack and on the youtube vid the font was screwed)
I have tested my dx10 on assassins creed and crysis and have noticed the diffrence so iv risked buying fpsc x10 and should arrive withing the week.
Downloads are dx10, Then The xp patch