Hi all BIRTs

I'm facing problem that I have to output some data from DB (several hundred thousands entries) and generate some kind of PDF form for each.
I'm grouping them by some attributes but resulting PDF would be really huge, so I have to create separate files per group.
My question is if there is some builtin feature of BIRT that can create separate PDF file per defined group/groups.
Thank you for any suggestions
Tonda