The pdf isn't very good, but it's worth the price. There are a ton of bodywork vids out there but lots are crap. Ones showing shrinking disk use are usually pretty good though.
https://drive.google.com/file/d/0B7w...pPRWloc28/view
Keep in mind that the top of the roof on the two sides don't need much work, in fact the top left side should go back where it belongs as the nasty creases are worked up. It looks like there's a bit of a crease on the top right that probably won't go back w/o some help. It looks like about 1/3 of the way from the right dent is a bit of damage on the arc.
If you read the file in the link it'll say to start with the last bit damaged and work back to the first. In this case I think you'll need to put some studs in the original fold of the roof, apply a good bit of force pulling up, and work the nasty folds at the very back. I'd probably try some hammer, then shrinking disk on the rearmost folds and repeat.
Pretty much repeating what hugger said...