32-bit or 64-bit version of Microsoft Office on Windows 7 64-bit bootcamp?

I wanted to ask which version I should download and install. First, I need to tell you that I use Windows 7 64-bit bootcamp on my Mac. I access it mostly via a virtual machine (VMWare). My Macbook has 8GB RAM and an about 3.1 GHz processor. I have about 10GB of free space on my bootcamp. Which version of Microsoft office should I install, 32-bit or 64-bit? Does 32-bit even work on my bootcamp?