>I was also trying to think of a help for this problem and run a search here in UT, but unsuccessfully. Basically, the problem is to be able to call printer dialog with Duplex mode selected, as I understood this question. I'm not sure, how to achieve this functionality. He may even need this for non FRX reports...

You could set up a 2nd printer on the system that points to the same printer but has duplex set as the default.