iPhoto to PScs4 and Bridge
At the moment when I open a folder of photos they are display in iPhoto. If I want to edit one of those photos I click the photo and then click Edit which then opens up in PScs4. Bridge is supposed to allow you to view folders or files of photos as thumbnails for editing and for technical data etc.
I was able to do this in Windows before I moved over to the Mac.
David
iMac, Mac OS X (10.6.2)