Upgrade from 32bit to 64bit with different version

Hi, I have w7 pro 32 bit but need to take advantage of more memory so want to upgrade to ultimate 64 bit. I'm a student and have seen that I can get an upgrade to ultimate 64bit but it says that I cannot do this from w7 at all but can do it from vista business - as per below link Windows 7...

Hello SF gurus and members ;) I just want to know which office 2010 is the best to install on my Windows 7 PRO 64bit, do you recommend 32bit version or 64bit version of MS Office 2010. what is the difference of it? any inputs is highly appreciated. Thank you.

We have bought some month ago 32bit and 64bit versions of Win7. From one of them we burned a backup DVD. Now we need to re-install Win7 on a computer but we did not found the original DVDs. Fortunately we have the backup DVD available. Is there a way to find out if it contains the 32 bit...

Hello, I bought windows 7 64bit upgrade version for students. However I want to use 32 bit now, since I have simply had too many problems. Is it possible to install Windows7 32bit and register it with my CD Key (which I got for 64bit Version)? Cheers.

To avoid the Student Win 7 hassle (upgrading Vista 32 to Win 7 Pro 64 bit ISO burn, etc), can I simply use the Home Prem 32 Upgrade (for my other computer) arriving this afternoon with my 64bit Pro upgrade key & end up with the 64bit Pro installation? Thanks.