I was going to ask the same question - the only answer I've found to date was by having the unit chipped. Can I ask which hack/disc you used to make your 2500BT region free for DVD? There seem to be a couple of solutions out there; just wondered which one you used, and is it overwritten back to Region 2 again if you do a firmware update?
The place where I bought it gave me a disc to do the hack myself, not sure which one it is exactly. It does have to be redone after firmware upgrade, which I haven't done yet so don't know if it will work.