Ultimate in class? Really? That is way overkill. You will only be able to use it for 90 days without buying it and Ultimate will cost you anyway. If you are taking a beginners course, Express would be all you need and it is free but ask your professor. I'm pretty sure that Ultimate can only be purchased with an MSDN account which will cost you $12,000.00!

Just an FYI, but they all do the basics that you will need. Ultimate will cover all languages supported in one IDE and with the money give you access to MSDN. As a beginner even pro will really not be needed as it just ads more functionality that you won't learn about in class.
http://www.microsoft.com/visualstudio/en-us/products/2010-editions/visual-basic-express
Also, if you have a school e-mail account you can get an account with DreamSpark and get the pro version for free via the site.
https://www.dreamspark.com/default.aspx
You can download the programs on a mac and simply burn them to CD to install on Windows. Just stick a blank cd and drag them to the CD in finder. Click the CD and you will see and icon to burn it. Simple enough...
Oh, and yes, you can install the 32bit software on 64bit OS, just not the other way around.