Q: Can I move iDVD app from my old iMac to my new MacBook Pro?

Yes.

Old Toad’s recommended installation method for copying iDVD from another Mac:

1 - copy your current iDVD application from the old Mac to the Applications folder of the new Mac. The latest version available is 7.1.2.  If you don't have that version go to the Apple Downloads site and download the iDVD 7.1.2 updater and run it on your current iDVD application.

2 - copy the iDVD folder that resides in the old Mac's HD/Library/Application Support folder to the same folder on your new Mac.

To burn a DVD with iDVD from the latest version of iMovie, you have to export the movie using the Export button and select 480p as the size. Open iDVD and start a new project, then drag that exported movie file into the iDVD menu window, avoiding any drop zones you see.

There's two more steps to the move:

1 - run Disk Utility to repair disk permissions after the iDVD fodler has been placed on the new MBP.

2 - launch iDVD, go to its Advanced preference pane and point iDVD to the new location of the Themes folder inside the iDVD folder. 

OT

Excellent!  Works fine.  Many thanks.