Photoshop CS4 – Fix : Error: 148:3

POSSIBLE CAUSE:
Flexnet Licensing Service not running

SOLUTION:
- Start->Run, type services.msc
- Find Flexnet Licensing Service and right-click
- Click Start if possible, otherwise click Properties, and set service to run automatically.

Source:
http://forums.adobe.com/thread/375447

Flush Photoshop CS4 preferences when freezing on startup

If Photoshop CS4 freezes on startup, or opens off-screen (into a multiple monitor ghost), you can flush the user preferences by renaming the preferences file:

C:\[User]\AppData\Roaming\Adobe\Adobe Photoshop CS4\Adobe Photoshop CS4 Settings\Adobe Photoshop CS4 Prefs.psp

Source:
http://www.wallpaperama.com/disp-post57.html