Headliner Nightmare

Hi FABO,
Im looking to get some feedback/help on my headliner.
I paid a guy $275 to install my headliner on my 1967 Dart 270 2dr
He spent alot of time on it, unfortunatly the car isnt mobile, so he came to my garage and we pushed it outside, in the cold rainy Seattle weather.
He got it installed, but not done. Still has a bit of wrinkles in it, wich he told me to put a heater in it and the wrinkles would slowly work there way out. Well I tried this and it worked a little bit, But heres the dillema.
He did the sail panels like they were suposed to sit ontop of the material, like some cars have. I did tell him I know nothing about the Dart and had no idea on how they were supposed to be set up.

After diggin around here on FABO, i learned that the boards were supposed to lay inside the material held up by a pin. with no material on the actual boards. He didnt do it that way, So headliner is glued down good with no boards in the roof sails. :cry:

So my question is, How can i remove the areas that are glued down, on package tray and sides under the trim, enough to be able to put the boards in their proper place with out ripping the headliner?
Any tricks to loosening up the glue? I know that heat is going to shrink the material, as thats how he told me to get the wrinkles out.

I really wanted this job to be done by him, But alas, hes not responding to any of my emails or phone msgs. Hes not with a company that i can go give hell to. Solo free lancer who came, did most of the work and dropped it in my lap. Im so frustrated with him, and the fact that i now have to deal with this on my own.

ANY help is greatly appreciated. I turn wrenches, I dont do, or havent done any kind of upholstery work, it kinda scares me lol.
Thanks Fabo. for any advice you can give me. :)
Alan