Help with KB940105 for gaming... Sins of Solar Empire

I really need help with this as i keep getting doesnot apply to your system
error whenevr i try to install. I have checked my installed updates and its
not in there. i even
installed vista SP1 and i looked through its documentation and it included
KB940105 update in it. But even after installing SP1 it didnt get installed.
i have searched thoroughly and have found no solution anywhere.

my specs are vista ultimate x86, 2gb ram, C2D 2.0ghz, 7900gs 256mb. and no i
was not
installing x64 version of the hotfix.

please help. i need this to play my games like sup comm, sins of a solar
empire etc. even nvidia suggests to install this update. after starting a
game i can play for about 15 minutes until it gobbles all the ram and then it
hangs up.