LOL, no way. OK, maybe in Flight Simulator X. Tell you what: check in Task manager. If you see it often at 100% or close, overclock it.
You really should get a Vista 64 for the newer GPUs at that resolution. That is, you'd need something like 4870X2 or whatever, and with a 32-bit Windows you'd lose access to a lot of your 4 GB of RAM.