One G2 two different themes

Hi!

I have installed gallery 2.1.2 and visually embedded it in to phpbb 2. I dont want the user to see any sidebars or even be able to try to login, so if I edit the for example the matrix theme so that just the thumbnails and pictures can be viewed. If I do that then I cant login as admin to maintain the gallery, couse there want be a login button.

So I wondered if it was possible to have two different themes to be run on G2, one for embed.php and one for main.php?

I have olso tried to activate two different themes in admin, then activated the member module so that I can enter the profile for my admin account and change to the second theme. So that I can edit the user theme and remove parts that I want. But I cant find the profile link if even there is any!?

And if there is pls tell me how or point me in the right direction.

Thx all!