Combine Printjobs

I need to combine multiple Printjobs on  a HP9000 with stapling unit. The Jobs are generated by some Windows Programms and are placed in the Printque. Befor the Print starts i am able to stop the que, now i want merge them all.

Is there a solution somewhere to merge the printjobs from a stoped Printque ? Perhaps by using System.Printing in the Microsoft .Net Framework ?

Or could you pehaps send some PCL command to the Printer(driver) that the Printer collects the multiple Jobs to one Big Job ?

Please help ...