D430 Windows 7 64-bit Drivers

I have windows 7 64-bit installed on my Latitude D430 and so far everything seems to work fine.

A couple of questions:

1. How can I easily find the windows 7 64-bit drivers for the D430? The driver download for the D430 does not have a windows 7 64-bit option and it's a little tedious searching for other machines with the same hardware that do have a windows 7 64-bit option in their driver download page.

2. Is the D430 really limited to 2GB RAM or is there somehow a way around this limit?