Changing a PRTF's USRDTA while running the print pgm?

[geir.kildal@xxxxxxxxxxxxxx]

Hello all.

I have a printpgm that prints to a PRTF.  At some breaks, I close the 
printfile and open it again to achive a split into several spoolfiles. 
This works OK, but I'd like to put a spesific label/name on each 
spoolfile( it will then be easier to recognize for the packing staff), and 
I wonder, is there a way to change the USRDTA on the printfile each time I 
open it in my pgm? 

Or do you have better ideas? 

Mvh.

Geir