John,
I am running PM from Windows XP and I want to be able to edit my photos in PhotoshopCS but when I click edit, it fires up a Ulead Viewer that is my default viewer for browsing images from Windows Explorer. How do I point the PM edit button to my Photoshop CS?
Open the Preferences dialog. Click on the Launching tab. Click on the radio button titled "Assign default application:". Then click on the Choose... button. Find Photoshop CS and choose it from the dialog.
If you want to assign specific editors for specific file types, look a couple of lines below where you'll find the sentence "Assign specific editing applications for each file type:". Click on the Set... button. There you can assign a specific editor for NEF files, CR2 files, etc.
HTH,
-Kirk