I've had a reasonable look around the AD policies but am I right in saying the only place that you can enable & define the group policy location is by editing the user, i.e. there isn't a group policy setting to (say) "Set the profile location to \myserver\users\%username%\profile" for all users in group XYZ?

I suspect this might be because of chicken & egg, i.e. group policy is applied after the profile has been loaded and therefore can't specify the location.

Cheers, Rob.