Vostro 1500 Video Driver Issues

I bought my Vostro summer 2007, the same month they came out.  I configured it with an 8600M GT and Windows XP Pro (32bit) as to escape having to deal with Vista.  I mostly use this laptop for gaming and because of that I'm constantly trying to get the most performance out of what I have available to me.  However, every time I download a video driver update from the Dell support site (for 32bit XP) I always get the same error whenever I try installing it: "The NVIDIA Setup program could not locate any drivers that are compadible with your current hardware.  Setup will now exit."

I've downloaded every single video driver update for my system that Dell made available over the past 2 years, and every driver, except for the one on the driver disc that came with my laptop, gives me this same error.  I've used modded drivers from laptopvideo2go.com in the past, but they don't have the same features that come preloaded with the Dell drivers (such as shutting off the back light when you close the laptop lid, this is a must since I have my system set to do nothing when I close it since I like to leave my system running).  And to make matters worse, I just went back to the driver page for my Vostro (for like the 30th time) and none of the download links for the newest, or the 2 oldest (only 2, there used to be 6 or 7) drivers were working.

I've looked all over the place for an answer to my problem, but have only managed to find more people in the exact same situation as me, with the exact same model of Vostro with the exact same hardware as me.  So, I'm coming to the source, why do none of the Dell drivers work for my system and/or what do I have to do to get a driver that works with my system that isn't over 2 years old?  I just bought Mass Effect the other day and it refuses to run with my outdated drivers (says so itself), and I'm none too happy at all about it.