Vista, Games and Headers

Well having just had to have manually patched a third .exe from a game of
mine to let it run in vista without eventually imploding as memory usage goes
up, I felt it was time to get an answer to this...

So basically certain apps don't have header files included in their
executables to address more than 2GB of memory and if they so happen to
approach 2GB of memory usage (as pretty much any game now is very capable of)
you WILL crash.
Games I have personally had to patch to this effect so far:
Supreme Commander - would crash to desktop after 30mins of a 6player+ game,
one manual patched .exe later yay it works.

Stalker - would crash on full settings after loading into a few areas, one
manual patched .exe later, yay it works

and just five minutes ago, Armed Assault - would crash seemingly after 10-20
minutes of play, one patched .exe later, and yay it works...

So a couple of questions on this to anyone who may know the answers:
1) Is this Vista's fault or the games developers?
2) how many more games am I going to have to patch by myself to make work in
vista? am I going to be doing this with every game I buy for the forseeable
future or is a vista patch in the works or something?

Signed,
Increasingly agitated vista gamer. <3

My Specs for reference:
Core2Duo E6600
2GB DDR2
GF 8800GTX (768MB)