My first response disapeared.....

OK, so do you fill in over the flange all they way to the edge of the suround, or do you still leave a gap?

is it about the same consistancy as the premix joint compound?

Do i need to do anything special so it holds form while wet? or can I just fill in the gap with a half inch of the stuff to bring it out to the drywall and it will hold?

I'm such a visual person, I wish I could just find a video example.