There's a reason why the GNex use MTP. the GNex only has one large storage unit, and mounting it would mean that Android OS wouldn't be able to have it mounted, so you would basically have to restart your phone in to some sort of special mode everytime you wanted to transfer something, and if...
You have to give more information if you want anybody to help you. There's nothing we could do with the info you've given us.
First, what happends when you try to install it, does it give you any error messages?
Hey people,
I'm new here, just registered, and I guess that I should says some stuff about myself. Well, I'm soon 16, I'm from Sweden, I'm bisexual and I'm extremely bored.