There is no reason for you to want your friends password at all. That is his personal thing, and the reason they tell you not to give it out is for their own personal safety on the net. Not for you to get into.
You can't do it but If you want to get somebody's pass you got to find out if he or she is on facebook orkut and all then tell the dumb people you will help them and not hack them (they will listen to you if there dumb) then see if the passwords match. Then you can try and type in that password to his MSN account
You guys are so dumb to hack into someones account all you have to do is go on the msn thing, then click "forgot your password" and then you will fill out like a small amount of stuff nothing personal, and then it says reset the password.. So youll make a new password for the person but then there old password will be changed ON THE BRIGHT SIDE you IN? ! :)