decompressing Multibit wallet private key in another wallet

I have some Bitcoin amount in my Multibit wallet. unfortunately i can not figure the password I put on it for transferring coins for the life of me despite trying all possible passwords i could think of. But i do have a back up copy of my private key and if you are familiar with multibit wallet you know upon backing private key it asks you to password protect your backup and i do have that password. so how can i impart this private key in another wallet and decompress it there? is there any wallet that can do it?
I do appreciate your help and comment.