Exchange 2007 32-Bit Evaluation?

I’d like to try the evaluation software in a lab environment on a existing 32-bit computer instead of buying a new system just to evaluate and practice on Exchange 2007.
I’m trying to find the minimum system requirements to run the 32-bit evaluation software, but I can only find the system requirements of the 64-bit version.

What are the requirements (RAM, CPU etc.) to run the 32-bit evaluation?
There will be no heavy load on it. I just want to get familiar with with installation process and the interface and setup and handful of test mailboxes.