Dell Inspiron 530, problem with Nvidia....

I've got a 2 year old Dell Inspiron 530 desktop. It has Windows Vista Home Premium, I have all the cds that came with it. I had had to restore it, It installed Windows fine, but now I have to install the Nvidia card and I'm stuck. The computer came with a Nvidia cd, but it doesn't auto play. The cd says it contains drivers for the 8300 GS and the 8600 GT. I have the 8300 GS. When I explore the cd I get 8 different drives, none seem to work. I went to Dell Laptops, Desktop Computers, Monitors, Printers & PC Accessories and entered my service tag and it says I need to download "R170550.EXE", when i click to download it it won't finish downloading, and that file is not included on the Nvidia cd thart came from Dell. I have a Toshiba LCD TV as my monitor. Windows looks ok, but it is too big for the screen and some of the Start menu is missing along with the menu/toolbars at the top of all windows. When I got the PC I hooked it up to this TV and everything worked. Now when I go to the display settings I can't get anything better than the lowest settings. How can i fix this?

You can download what you need direct from Nvidia. Click THIS LINK and download and install the drivers you need.

Just make sure you know the exact name of your graphics card and the type of Operating System you have so you get the right one