1972 Dart Door Glass HELP!!

Alright so my driver door glass jumped off track when I hit a pot hole this past fall before I put her away and exploded in the door...:banghead:

So Saturday I picked up a complete 68 driver dart door for a price I couldn't pass up. :cheers:

But my problem is I need to take the glass out of the 68 door and put it in my 72. Now I'm completely new to this and will need some pretty dumbed down instruction on how to do this..

Should I just use the glass or the entire assembly?
some help would be much appreciated guys, thanks in advance.