You should think about getting an AMD, because the Pentium 4M and the Pentium-M(Centrino) are both WAY out of your price range. Or you should think about spending a few hundred more dollars and getting something decent.
If you're willing/able to go Mac then you can get a nice PowerBook for around $750 on eBay. It'll be an older one with like a 500MHz G4 but it'll deffinetly do what you want it to. You said 2d right? Little to no 3d. And one of those would probably even run 3d stuff if you wanted, just not super well. Just my 2 cents