QTR-Quadtone RIP

I'm using a Mac running 10.4.2 with an epson stylus pro 7600 and ultra
chrome ink with premium glossy photo paper on a roll.  I'm having a
problem where my print is coming out very dark.  I've been doing some
reading on this group and I'm confused about how one creates a curve
or adds it to QTR.  When I go to print and pull down as it is just
after I installed QTR I have no curves at all to choose how do I
install them?

Thank you 

Jim