How to add 64 bits drivers on a 32 bits machine? (For sharing purposes.)

I've installed the server version on a 32-bit machine and added a printer there.

When I share the printer and go to a 64-bit (Win2008) machine to connect to the printer, it can't find drivers. This itself is correct, because the 64-bits drivers were not added to the install on the 32-bits machine.

I can go to share / more drivers... at the printer properties and select x64. It then asks me for the location of the 64-bit drivers. Where can I locate those? As I can't find seperate (inf-)files for 32- and 64-bit in sourceforge/pdfforge.

With a 32-bit client PC: all works fine (prints autosaved to a shared dir).