Is This Possible?

I am wondering, if you can, can you do a hotswap from one xbox to another? would this change a password on a hard drive to the one bedded in the mother board of the xbox? someone must know if this can be done!

 

No. you can't change the eeprom and lock by the other xbox.

 

even if the one i am going to swap is softmodded? unlocked?

 

yes.
If you can borrow a modchip then you can fix it.