Photoshop CS3 Crashing

Recently, our Photoshop CS3 (Extended) repeatedly crashes. We are working on a Mac (OS 10.6.8).
It crashes at no specific/particular point, during a specific action, or when in a particular file.
But it happens very frequently when trying to work.



We have uninstalled and re-installed it over a dozen times, even on different hard-drives.



Since Adobe can't/won't help, we were hoping somebody could help us.