How to correct accidentally deleted IDVD themes
I used a file clean up program which accidentally deleted my theme files for the IDVD program & thru many, many frustrating hours/days trying to figure how to correct it (if possible) here is what I found.
After locating my deleted files (in trash):
1) Click on "Finder Icon" btm left of screen (or wherever you have your dock located)
2) Go to the file named "Library" / "Application Support" / "IDVD"
3) Locate a file named "Installed Themes Folder" all those files are listed there
4) Drag in any of the missing theme files needed & restart your computer
5) Now you should be able to access those missing files in IDVD w/o any error issues
FYI, I know others say that if you use any program to clean up your computer is quick and easy. However, you won't be able to restore those accidentally deleted (trashed) files by highlighting them in the trash & click "Restore" it does NOT work & I called apple for assistance to which they confirmed this is true, so be very cautious when attempting this, read any & all notices prior to deleting any checked duplicated video, picture or sound files & make sure you know/understand which will be deleted. I know I have learned my lesson, & just wanted to share my experience.
Hope this helps anyone who may have run into this issue as I did.