David the answer is unequivocally Yes and no!

No, as in you cannot send an image to two printers at one time, but yes, as in (especially on a large print) once the printer has started, or put another way, once Qimage has finished processing, you can start another job.
If you have your printer set ups all saved, you need only to click RECALL, a desired setup from the 7900, (Change the image or not) and tell it to print.

The setup from RECALL will set the print size, the correct printer, all the driver settings, the correct print profile for the printer and the paper selection.
Click PRINT.

Further to that, you might save the whole JOB including the above, and the image, and any text, borders, margins, anything at all, reset in an instant.
Click Print.
All this while the 9890 is chugging through the first 2 inches of its print.

Fred

Yes, and no!
Don't you hate it when people say stuff like that! 

If you only want to use one printer at a time, Qimage will REMEMBER the last printer used.

So if the last printer used is the one you want to use now, then Yes, all you have to do is load the paper.
If the one you want to use now is "the other" printer, then you will have to click on PAGE SETUP, top right of Qimage, just to the left of the PRINT BUTTON.
Open that and select the printer.

The saved JOB or saved printer setup is a shortcut for you.
You don't have to use that method.  You can select printer #2 manually, but that will entail, changing the printer, the paper, the printer profile, the print size, and teh quality settings.
All this is, including not having to open page setup is done for you in one click of OPEN, after you select the proper printer setup.

Fred

Fred