How do you change certain things in facebook groups if you're the admin?

[:P]

I just made a group, and realised that I wrote the description in the wrong place, so I want to get rid of that, and I don't want people to see that I'm the administrator. Please help? Thanks
Ok, I've figured out the description thing so now I just need to not show myself as the admin. And I think you can do that, because I've joined loads of groups with no one visible as the admin.

[Wadud]

Not possible to change.