[X4U] Batch iPhoto processing

[John Kiss]

I updated to iLife '06 and in iPhoto, I noticed that the color  
saturation has changed for some of my pictures. Also, the identical  
picture displays differently between iPhoto and Preview. After some  
investigation I realized that some photos in iPhoto do not contain  
embedded profiles. These "bare" photos are creating my problem and  
once I add or embed a color profile all seems fine.

Here's my question. I have about 4,000 photos that I need to go  
through and embed a color profile into all those without one now. All  
these photos sit inside the Originals and Modified folders inside the  
iPhoto folder. Manually checking and changing each photo is too time  
consuming and out of the question. Is there some way to do it  
automatically?

I looked into Photoshop, ColorSync Utility, and Preview and none  
allow for batch processing. Any ideas?

Also, what's the best profile to embed? Adobe RGB, sRGB, etc.?

Thanks,
John