photos not showing up

I have been upgrading hardware and software and have an odd problem. I moved from an old PPC Mac (10.4.9) to a new iMac (10.7.2). I first moved my iPhoto 6 library (actually 2 libraries) to iPhoto 11, and thought things were fine. I then decided to make the move to Aperature 3. I had a book on iPhoto 6 that I decided to finish off in iPhoto 11 rather than remake in Aperature. Well...the photos weren't in iPhoto (the book was pretty much empty), and I found they were not in Aperature either. I see them in iPhoto 11, but when I click to edit them, for example, they do no appear. I did not have the original iPhoto library in the default location (not a big enough hard drive) and don't have it in the default location now either (put it on the 1TB drive instead of the solid state drive) Wise? Anyway...if I search the photo title in the finder, I find a full resolution version of it in the iPhoto library>Masters (then on down in the folders to my photo.) From there I can open it in Preview, make a copy and save it somewhere else. YET, it is not seen in iPhoto? And when I copied the library into Aperature, those photos did not appear either.

Luckily, I do have the photos on my laptop, so they aren't dead and gone, but...it's curious. And these photos (taken from multiple cameras on a large family vacation) are the ONLY ones that seem to be missing. Another odd thing - when I went to export the files from my laptop to this drive, it said that there was an error writing to the files. I am now writing them to another external hard drive.

I've been able to add new photos from my camera into Aperture, so...?

Any ideas on how to get iPhoto 11 to recognize these photos or pull them out of the iPhoto library without hunting and pecking all of them individually?

Thanks.