So if I am painting my screen on drywall what am I using for the border around it?

I went with a nice 3" door molding. It cost about 3.00 for every 8 feet. I painted it flat piano black and couldn't be happier. I also painted the wall of the screen in the same black, so the moldings are barely visible but their there.

wondering the same thing, saw some nice examples of crown molding with rope back lighting, anyone have any problems with this

Guys, it's a simple as using 3.25" Primed MDF Base Molding. It's usually about $0.68 per Lf at Home Depot, more at Lowes. However at Lowes you can find smooth, rounded edge MDF Base in 2.25" width, which is great if you want a skinny'er trim for a smaller sized screen.

See this Tutorial:

http://www.avsforum.com/t/865218/wrapping-black-velvet-on-trim-with-mitered-or-butt-joined-ends

Using the same material (MDF) you can instead paint it Black as well, but in no way will that have as good a result or as impressive a look / feel as Black Velvet wrapped Trim.

If your referring to Crown that has a angle on each end, the issue is how to attach that trim using only that very small footprint. (...you can do it by ripping a very small Triangle to use as a "Nailer" and gluing it to the Wall first...) If your wanting to back light the edges with Rope / Led Lighting, the standard procedure is you have to fur out the main screen surface at least 3/4" (1.5" is best) and simply place the MDF Trim so that the outside edge overlaps the Rope lighting at least 1.5"