Digital BW, The Print

Am at an impasse trying to print greeting cards on my 2400.  The 
unfolded size of the card is 7X10 and a heavy stock.  Using Win XP and 
the watercolor paper setting the printer forces me into single sheet 
manual feed.  The manual feed adaptor that fits in the rear of the 
printer handles 81/2 inch paper as the smallest size.  Does anyone know 
of any way to handle this situation?
Appreciative of any and all help.

Barbara Woolner