[quote name='a_bleak_tomorrow']Also isnt there a way to hook up two video cards would that improve my proformance?[/quote]
Yes, you would first need a motherboard that supports that, in your case it is called Crossfire(SLI for Nvidia). Next you need two similar cards, in ATI's case I think that it can be any Crossfire card, in Nvidia's case it has to be the exact same card.
In both cases the gains you get are not that big, on average I think you can get a %50 increase in the best case. Some times it actually makes things worse.
But in your specific case it is not worth it at all, even if your motherboard supported that. The increase you would get would still leave you with a crummy card going a bit faster. And in any case, the money you would spend doing this could buy you a much better card.
So bottom line is yes, but don't.
Oh, and to comment on the downloading games things I have this to say. Apart from the fact that you can't resell them, which I agree with you that the used PC game market is not anywhere near the level of the console one. I would argue though, that you can save money. Games that you download do have sales but nowhere near what you can get in retail or online. For instance, on Steam you could buy Left 4 Dead for $45 with a preorder or $50 after it came out. Circuit City had it for $40 a day after it came out. But really, after a game online hits a certain price like $5 or so or $10. I doubt it would go down, as they have no overhead they can price it anything they want. While a retail store has to mark things down to make room for new merchandise and such.
A thing like Steam will eventually go out of buisness, I am not saying it will happen for sure in the next so and so years. But eventually, and you could make the arguement of that by when that time comes you could care less about those games. That's fair, but I like to have a library of games I could go and play at anytime. Few buisness last a long time, Bell did and it was broken up into many companies and blah blah blah. Even if Steam goes off they might give you an option to be able to run the games without Steam, yeah that's nice and all. But really, it can happen that they do not.
Blah, I am done. This is off topic.