Digital BW, The Print

I've sent a question to Roy, but haven't heard back yet, so I 
thought I'd ask the group.  When I use QTR on the 7600, I can't get 
the top margin to be less than 9/16, and that doesn't leave room at 
the bottom required .55 in for the 7600 paper feed system to get a 
full 10" print.  Can anyone using a 7600 tell me how to get the top 
margin back to a true 1/4" from the top edge of the paper?

Also, will it accept resolution greater than 1440x720 for enhanced 
matte paper?  Or super(x) microweave?  I'm getting finer resolution 
using the Epson driver with simply 1440 and super(x) microweave than 
with the QTR at this point.  The difference in resolution is visible 
to the naked eye, so it's a problem with me.  Would appreciate any 
guidance or corrective action suggestions.