Well since I apparently fail at adding in colors.
1)You wont get a free mw2 unless your friend buys you one, your parents, or you go to AlterIWnet.
2) Even if you lost the cd, there should be a serial code on the box or case the cd came in.
3) If you managed to lose your password to steam, there is a recover password option which emails you your password, if you used the same password for both, here is a life lesson.. Don't use the same password for 2 different things, it bites you in the ass.
4)All in all, by the vibe your post gives off and the circumstances that is you asking for help on a hacking website when you could ask anywhere I get the feeling you got banned.
Good day sir, back to world cup.