64 bit
C:\Program Files\Adobe\Adobe Photoshop CS4 (64 Bit)
32 bit
C:\Program Files (x86)\Adobe\Adobe Photoshop CS4
the other stuff is here also:
C:\Program Files (x86)\Adobe\Adobe Bridge CS4
C:\Program Files (x86)\Adobe\Adobe Device Central CS4
C:\Program Files (x86)\Adobe\Adobe Extension Manager CS4
C:\Program Files (x86)\Adobe\Adobe Utilities
Larry
Wow, I can't believe that we are helping Jeff (who helps us so much of the time)! In addition to what is posted above, Win7 and Vista store personal settings in a separate place (this holds for Lightroom as well).
These would be in (this is for Win7 64 bit as that's what I run):
C:\Users\username\AppData\Roaming\Adobe Photoshop CS4
C:\Users\username\AppData\Roaming\CameraRaw
The CameraRaw directory would contain all of the users personal camera profiles (for me they are made with the X-Rite Passport). Since I use Lightroom 99% of the time, I really don't have any personal Photoshop settings (just checked).
Hope this helps and I would also like to thank you for the revised version of Bruce Fraser's Image Sharpening book; I've found it invaluable.
Alan