Setting up CUPS to spool to a file

[Kirk Haderlie]

Is it possible to set CUPS up to spool to a file instead of send the 
output to the printer?  We have a RIP product we would like to run the 
file through and have that that application send the final output to the 
printer.  We could write a filter to achieve this, but if CUPS can 
already spool the file to disk it would be nice to use that.

The workflow would be CUPS -> File -> RIP -> Printer.