Network Wide 2k -> XP Upgrade?

[Swimming_Bird]

I've searched and mostly what i can find is just fresh network installs. I just want to push an upgrade over the entire network, preferably on a group basis. I've seen a few tools that may be able to do this but none of them seem any good.

[Swimming_Bird]

i realize this may be a common issue but at least post saying omg why didnt you search or whatever.