At first, the video card's name is "GeForce 7500 LE". So, you actually could not find any "Gforce"'s.
As the second, if you go to Nvidia vebsite download drivers section, you'll see that it has only one set of choices (Graphics driver->GeForce and TNT2->Windows Vista x86), which is applicable to you. Of course, if you run 64-bit Vista then you will want "Windows Vista x64" as the last selection. Therefore, we are coming to a web-page http://www.nvidia.co.uk/object/winvista_x86_97.46_uk.html
for Vista x86. There is a download link and you could read all linked douments on this page also.