Keychanger?

Hello, is it still possible to use a keychanger on dayz mod like it was back in the day? I am wishing to change a banned cd key for an unbanned one, if its possible what key changer could I use because darky's does not work anymore.

And another question, what if I use hacks on a legit account and end up getting banned, does only arma2 suffer from the ban or is there danger to the whole account and my other games?

No to both questions, its linked to your steam account.
You need to buy a steam key through the steam store or third party dealer and register it to your account.
If you get banned you'll need a new steam account.