Transfer a activated CD key to an active account??? help!

I played Guild Wars a lot over the summer with a CD Key purchased on ebay. I'm guessing whoever I bought it from wasn't legit because Guild Wars disactivated it after a couple months. When I log-on now it tells my key is no authorized to play Guild Wars but gives me the option to enter a new one. My friend is letting me use his account and was just wondering if I could somehow use his CD Key for my old account or transfer it or switch them somehow.

It would be the most convienent if I could just switch my account to his because he isn't sure where his CD Key is but if I need it I'll look. Any help is appreciated. Thanks!

You cannot. His key is already in use, and is linked to his characters.

Las is right; Unfortunately one account links to one players characters. You really can't do what you want, sorry. Hope this info helped. <I know ebay is cheap, but think, offer 45 bucks american for it and you KNOW you will have a legit key, just suggesting.

--The Shim