best way to remove window trim and not wreck paint?

Hey guys,

i got myself into a little dilemna where i put my rear window in, trim and all, and now i have water leaking on the passenger side...i want to remove the trim to get right at the weatherstripping, but it is proving to be a royal PITA that is scratching my paint....i ran tape all around the edge of the window in order to avoid scratching the paint, but im still worried i may do damage if im not careful...any tips or tricks for not ruining my new paint job while doing this?