There is a body tool made just for this purpose, it's a flat bar about 6 ft. long and loops over the body striker bolt and a bracket slips into the door striker. It allows you to almost close the door when in place and then lift up on the bar to pull the door up to the proper heigth, being careful to not pull up too much. It's usually the bottom hinge that gets pushed into the door frame. This bar just pulls the door frame back out. I was going to take a picture of the tool but my friend had lent it out to someone, and it isn't returned yet.
Zip.