Partition disk for dual boot Windows XP and Windows 7 (shared documents)

"I think you will indeed need a third partition, that would be the easiest.

Windows XP will see Windows 7 partition without problem, so you could use the Win7 partition for your documents. However, unless you change the system partition letter for Windows XP to something else than ""C:"", you won't be able to access it from 7, as it will mask it, to make the system believe it is actually on the C: partition (even if it is on another), and therefor you won't see the Windows XP one, under 7.

Note that my point of view is based on what I experienced after trying the beta of Windows 7. this behavior could have changed since, or there can be workarounds.

Depending on what you need the dual boot for, you can also consider installing Windows 7 as the main system, and installing XP on a virtual machine, which would probably make document sharing even easier."

"Here is how I did this with Windows 7 , Mac OSX and Linux

I used a separate documents partition that each OS points to. No matter what OS crashes later I still have access to my documents from an alternate OS

http://teknogeekz.com/blog/?p=475"