[dosland]

I've done it on a cheapo, no big deal - just run the right size pilot hole with a super sharp drill bit. I put tape over the site before drilling, some people think that helps avoid any cracking of the finish or flaking. There is usually a felt washer to keep the thing from getting over-tightened into the finish, just don't screw it in super violently and you shouldn't have any trouble. And don't do this to a good classical guitar, unless you're really comfortable with it.