Hmm, not sure which fabric you're talking about, I'm not usually thinking about headliners in new jap imports.... Nor have I been in one in an investigative mode any time recently enough to remember. Good luck though, it'd probably look cool. Maybe kind of like the VW material? I still like the suede theme thats been going around.
Staples won't damage it, its a pretty thick material, kind of like fiberglass particle board, if that makes sense. At least, if I'm remembering correctly. Staples or thumb tacks should hold it for now.