Vista and windows 7 drives transfer information?

[jampack714]

I currently have a vista hard drive. I want to buy a new hard drive and install windows 7 on it. Will I be able to access files while booting on the windows 7 drive from the vista drive?

For example, can I load an excel file from the vista drive when I'm running windows 7 on the other drive?

 

[jampack714]

Another question is whether I can have 32 bit on my vista hard drive and 64 bit on my windows 7 hard drive?