I can do that. I'll edit this post with the results soon.
EDIT: like I told ya.
I couldn't get above the top right screen, however: (!)
I don't know if anyone's been in there before (I know I haven't), but in the bottom left screen there is a lever that must be pulled by a flying slig:
It's rather pointless though. It opens this slamdoor here (and makes a flying slig spawn when you take Abe up):
But that doesn't allow you to do anything except possess the slig and fly around with him:
