user levels and free site set up help

i have client levels bronze, silver, gold who are all site admins to their own site

i want to add a free level that is also a site admin but i dont want to show them a lot of stuff (beyond plugins and premium themes that pro-sites can easily do)

stuff like i dont want a script to run if they are a free member or i dont want the free accounts to be able to exit easy blogging

so with in the code i can do a

IF ( user has admin rights)
show this
ELSE
show this
END IF

but if everyone is a site admin how do i do it?

is there a way to create a new user type(admin, subscriber, editor, FREE)? with separate user permissions?

then i could do something like

IF ( user has admin rights AND user level is free )
show nothing
ELSE
show everytihng
END IF