mattwnz:You may want to contact the company that installed your door frame to get them to install the new door panel for you then they would handle it all. Doors can be PITA, especially if they drop, or warp slightly, so you should make sure that if you do have problems with it in the future, they will come back to adjust it.
Doubly so if you're going with exotic options like offset hinges, which change the way the door opens and are a pain to get right.