Since the laptop had XP on it when it was given to me to fix, that was the OS I started out with.
In the end however, the way I solved the problem was to just go ahead and Wintoflash a copy of Vista and install it.
Sure enough, a couple hours later, (after I went out and got the drivers from Gateway) it was up and running just fine.
Thank you to all who did help though. I really do appreciate it.
Talk to you all later!