Defaul Sync location under XP Professional

[qdup]

Hi.

Can anyone tell me if you can change the default location of where iTunes saves the sync'ed data. It current saves to my profile in application data\apple blah blah blah but due to the size of my synced data i would prefer to save this external to my XP profile. I have looked in iTunes prefrences but can't seem to change its default location. Any suggestions much welcomed. Thanks