need Help.. Quick...

my friends decided to change my password on my powerbook. they left the room, they went to play. i came back, couldn't log in. i called them, they forgot. i got mad. now i'm stuck. can i reset password with boot cd? if so does it delete everything?and since i have panther, do i use the 10.2 disk or the 10.3? help...

thanx.

dah.. nevermind. i hacked the password. turns out it was some japanese phrase which was misspelled. after the ordeal, my friends were beeaten and i am happy.
haha.. ok