Vista 32 or 64

[Vroomparrot]

just a question- can Vista Corporate's change also? Just I've been given a 32 bit version of Vista by a mate at work but I'd like 64 bit Vista at some point

Yes. I've just got both from work and they use the same key.

Is your mate aware of MS' new volume activation for Vista:
http://www.microsoft.com/technet/win.../plan/faq.mspx
If he's handing the key out all over the place it could ending costing your company quite alot if that key gets out into the 'wild'.