IPhoto Locks Up

Question

Here is what happens (iPhoto 6.02 and OS 10.4.6):
1) iPhoto starts and organizes itself, then after a few seconds it send up the "Alert...the movie x or photo y could not be opened, because the original item cannot be found."
2) I find the photo. It loads. The I get the blank screen of death and iPhoto locks and I have to Force Quit.
3) Or, it tries to find a non-existent movie and I cannot even move beyond the original alert wihtou Force Quit of iPhoto. All I get is the spinning beach ball of death.
Have tried:
1) All the rebuilds from scratch.
2) Reinstall all the way to 6.0.2
3) Reinstall just to 6.0.1
4) Tried changing permissions as reccomended in other posts..
Same results. iPhoto has become useless to me as I cannot get beyond these database alerts. In the case of the photos (and it asks for hundreds and hundreds of them) it cannot recognize what its own meta-database says is there; in the case of movies, it just locks up totally, immediately.
This is desperate for me. New baby, lots of photos, people coming over and a new printer ready to print them, but I cannot organize them or anything. iPhoto is turning into the worst experience I have ever had with an Apple product. I have good backup, but my content is inaccessible.
iMac G5 20"   Mac OS X (10.4.6)  

Answer 1

Tom:
Have you tried the following:
1 - download BatChmod and run it on your iPhoto Library folder with the setting as see here.
Your photos are still safe but you may have to create a new library. To do so launch iPhoto with the Option key depressed and then create a new library. Then manually import the folders, one by one, that are located in your old iPhoto Library/Originals folder. Do it manually by dragging each folder into the open iPhoto window for the new library. That way you might be able to located the problem files.
Congrats on the new arrival!