when ever i do blood i usually just select a certain area fill it with a dark red and then smudge it a around the edges. then i use the burn tool to make it darker in the center. there's plobably a better way to do it but its fine for me.
the wounds usually come out looking like this
http://img178.imageshack.us/img178/...unflashcopy.jpg

btw if anyone knows a better way to do the gun fire thingy can u lemme kno? thx

~Arcadebx