If you have 32-bit Intel Pentium 4 you should download and use Linux IA32. Those letters come from Intel AMD 32-bit. You can ensure that if you write uname -a in to console and you should see a input about type of you Linux. The end part tells it everything. It should be something like "i386 GNU/Linux" and you should download that nVidia Linux IA32-driver. ;) -Antti-
