the factory tweaks linked are just for minor adjustments.
with a SPRUNG/flatted door this is unlikely to do much.
the op might post a few pics so we can gaze of the degree of damage,
but IF the top and bottom are flatted such that there is 1 inch of GAP at the top and bottom...
the most effective repair (as i understand it) is to REMOVED the interior door skin (drill out the rivets)...
((not just the window frame as shown for minor adjustments in attached pdf))
then reshape the 2 primary outer sections of skin...
then REinstall the inner skin with new rivets, new rivet HOLES and so on...
the inner skin will then be under tension and HOLD the newly formed arc of the outer door panels.
using simple brut force to RE arc the door without this step will not provide an effective repair.
slowly the door will LOSE arc again, with both top and bottom sections flattening again.
and the upper/lower gaps will reappear.
it might cost upwards of 500-1000$ to properly refit a flattened door...
and that's IF the hinges aren't loose or damaged.
but the price of a NEW door (which includes the frame) and installation will be 3,000$....
all of the true things that i am about to tell you are shameless lies. l.b.j.
we are here on earth to fart around. don't let anybody tell you any different. k.v.