Did you really try
?
Anyway, here is the way.
1-Launch dvdshrink
2-Open the first movie ("file" if already ripped, "disc" if not)
3-Click on "re-author", a new window will appear
4-Drag your movie from the first window to the second one you just opened
5-In the first w., open your second movie, and drag it in the second w.
6-In the second w., click on "backup!"
7-Wait and thank
