I have a dean XZ and i've been thinking of putting in a stop bar instead of having it string through like it is now. any suggestions or comments on this?
my les paul has the stop bar and i kinda like it better, sorta like a gibson explorer too. but if changing it will kill my sustain then i can leave it alone lol.

Its possible, its not really easy, but it will work.

You're going to have to drill out the holes for the posts without cracking the finish, which shouldn't be too hard if you use a slow speed and a sharp bit.

but yeah, its pretty easy. just drill a couple holes.

As far as sustain goes, ti doesn't really do much to it. Most of the sustain comes in the construction of the guitar and the materials used.