I swear this is the last question for a few days. Is it common to have a lot of body roll ( seems to sway a lot ), on a 2000 trooper?

with OEM shocks yes.

New shocks will slove the problem.

Here are a couple of places to purchase shocks:

http://independent4x.com/

http://darlington-offroad.com/

OME (Old Man Emu) are the shock of preference by many Trooper owners.