Okay. Thanks, Plastik. I guess I will look around mplayer's commandline parameter and see if I can pick up useful things...can't have you do EVERYTHING for us....lol...:P....I will look into that conf thingy.

EDIT:
After a quick googling...I FOUND IT!....Test it on an anime movie and it works.

"#" to cycle through audio (you have to HOLD the FN key (then press D) instead of pressing it once)
"J" to cycle through subtitle

HERE is the link to a list of shortcuts for mplayer. SOME of them may not work though. CHEERS!