Ok...I wasn't able to just reinstall iLife from my original set up discs. So I reinstalled Panther using the set up discs that came with my PB. Then I installed Tiger selecting "upgrade". Now I have what I need.
Next time try an "archive & install" rather than "update" -- that will preserve everything but what you are updating (Tiger, etc.) Just make sure to check the box for "preserve user settings" or whatever it says (not at the mac now, so can't check to be sure of specific wording).