Need help with HP 9040 printer in solaris

I have configured HP 9040 printer on my solaris server using lpadmin command and printer is working fine but customer is saying that printouts are coming on top of the printer not to side stacks. I would like to know how to send printouts to side stacks insted of top of the printer. Is that something needs to be done printer itself or we can confiure with lpadmin.

---------- Post updated 08-06-09 at 11:02 AM ---------- Previous update was 08-05-09 at 06:49 PM ----------

Please help me, appreciate your help !!

have you read here:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=de&taskId=115&prodSeriesId=446406&prodTypeId=18972&prodSeriesId=446406&objectID=bpl01713
?

I saw the document, looks like there is no option in lpadmin to route the printouts to side outbins

but you can download hp drivers and tools... maybe there is a option for what you want.