Ok, I have Windows XP Pro and Windows Vista Ultimate dualbooting

I have 2 hard drives and on one of the drives I have 3 partitions - XP, Vista and another one which I will be playing around with for centralising all this stuff.

I have previously been abled to move My Documents area to another hard drive. Since I have Office 2007 setup on both XP and Vista, I was wondering if it would be possible for me to have it setup so that it loads the outlook profile settings from a location available from both XP and Vista on this seperate partition. So what I want is to be able to check my mail in XP and then when I check my mail in Vista I have the mail I recieved in XP as well without having to transfer pst files around all the time.

What I will also be trying again is to have all programs setup centrally on this partition so that I can have the same programs on both XP and Vista without duplicating. Of course I will probably stick to the main programs on this partition as windows seems to have a heavy reliance on the registry.

My other option is to switch to and stick with XP which at the moment I am considering now that I have got this headache that Microsoft most cunningly set upon me.

Any help would be much appreciated.