OMFG im so unbelivably frustated ok..

so i want to change my Steam password but i have to know my current password to change it.. after two years of it being set to auto log in.. i have no idea what my current password is.. HELP!

also does any one have Guild Wars.. i am a little lost as to WHY MY ACCOUNT DOSNT WORk. if i bought and downloaded my Guild wars from steam wouldnt it be that same login as steam if i create a new account for guildwars where are the CD keys from my purchas