Printing from a script, from the file menu or both?
Quits from printing to any printer or just one specific printer?
Quits when printing from a small brand new test file?
this is one of the reported issues with the latest patch for Snow (10.6.8)
it seems that there is a new patch - so re-install the last update one more time (security update 2012-001). The following PPC applications caused problems:
AppleWorks, Excel X/2004, FileMaker Pro 6.0/7.0, Freehand MX, Photoshop CS1/CS2, Toast 6.0 Titanium, Word X und 2004