32 bit or 64 bit version on a partitioned hard drive

It was suggested in another windows 7 forum that I place this at this forum to see what your answer would be.
(They also suggested that I select the 64 bit.)


I have purchased a brand new computer Windows 7 Toshiba Satellite P750.

I am a trainer and still have to train in Microsoft Office applications 2003, 2007 and now 2010. I want to partition my new computer so that I can run all three versions on it.

The quick installation guide says that during the installation I have to "select one version of operating system if prompted 32 bit or 64 bit". I am leaning towards selecting 32 bit version but am not sure if this is the correct choice.
Can anyone please advise what would be the correct choice?

Also can anyone point me to an easy instruction on how to partition the drive to enable me to run these three versions of office software.
Do I need to also install xp operating system with 2003 office software and vista os with 2007 software?



Thanks heaps

This question has been asked again under the title "What would you do"?

Please do not respond to this question and only respond to the conversation titled "What would you do"?