Just specify what it is you wish to change. Please understand that installing a graphical interface is not a common concept on servers in general (linux anyway).
You say you want to configure the server just like you use the server-manager web interface. The server-manager is intended for the configuration.
If you want it simple, like Philips advertises about, "technology as simple as the box it came in", don't go into the console. SME should be working just fine without modifications. Simplicity does come with limitations, such as lacking the posibility to change access rights for specific ibays like you say you want to...
Since this is file manipulation, I believe "Midnight Commander", which was what I referred to in the manual, should do just fine. Type "mc" at the console prompt.
If you're not ready to go with any of the solutions, or do not want to go into specifics about what you want to achieve, try to figure it out yourself. Google is your friend in that. If you get stuck, just ask about the thing your stuck on.
I'm not trying to be rude or offend you, it's just imho clear their is little interest in figuring out how to install a gui. Going "anybody wanna do the thinking for me" won't work you know.
If you're really getting stuck on the english, just "pm" me in dutch, and I'll see about translating it into the thread..