Windows 32bit vs Windows 64bit

Hi all,
This might be a dumb question but I won't know unti I ask it.
Most of us use 32 bit but I'm wondering what the consequences are of using 64bit instead. I've read that only a few programs run in 64 bit mode but does that mean only 64 bit programs run in a 64bit windows environment? There are many programs I use that don't even offer 64 bit (such as Roxio Easy Media Creator) and I wonder if I just can't use those at all or is there a 32bit mode that will run within a 64 bit O/S? If there is, is it stable?
Is there something I can read that covers this topic or can someone give me the "Dummies for 64 Bit O/S" rundown.
I'm interested in learning XP Pro, Vista and Win7 with this 32bit vs 64bit question.
Thank you,
Dennis
Dennis

Dennis, the proper questions is whether or not the program will run under 64-bit Windows.
Your best source is the application's developer. They answer email from prospective customers promptly.
Lists like these sometimes say which version. Look for "64 bit" or x64.
   Application List: Certified for Windows Vista
   Application List: Works with Windows Vista
The list here usually tells.
   Windows Vista RTM Software Compatibility List  
-Jerry

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