The other alternative is that for like $10 each you can buy them to run on a modern system at GOG.com
Yea you paied for them once, but think of this as a really good emulator for you computer so you can run them again.
I picked up 1 and 2 from GOG.com before 3 hit the market for the PS3 (ok, before it got cheap.) I wasn't an RPG fan when they were new ( I was a combat flight simmer then.) 3 was......disapointing. Looking forward to New Vegas!