I'm trying to enter the individual discs for American Dreams Season One and copied the cast list from the main profile as a starting point with the idea of deleting all the episodes that aren't on that particular disc.  The problem is that I must individuall right-click and remove all four hundred or so cast entries for the twenty episodes not on each disc.  There's not even a keyboard shortcut.  If I could just shift-click and select everyone above or below a certain point and remove them all at once, this would go hundreds of times faster.

How about using one of these two great editors:

Tom Gaines' Cast & Crew Editor
goodguy's Credits Editor

Edit: One of the masters himself beat me to it.

Quoting Ace_of_Sevens:

Quote:
There's not even a keyboard shortcut.

Alt-R removes the currently selected cast member for me, leaving the cast member below selected. And it auto-repeats. Perhaps I mis-understand you.

Crew is more irritating, but Alt-R on a divider removes all of the crew positions "associated" with that divider, albeit with a confirmation Return required.

Copy all cast/crew, paste into notepad, delete the bits you don't like, and paste back in also works.

With all that said, I would also like to see multi-select implemented in those dialogs.

(and I miss the KISS avatar)

Actually, if you are editing Cast/Crew the Remove button has the "R" underlined (Remove) which is the universal symbol for Alt-R ... in the Windows world at least. 

Yes it would be nice to have full editing embedded but the the external editors mentioned above powerful.  Or you can paste the Cast/Crew content into a good text editor and get medieval on the XML.  I've used all these methods to good effect.