QTR-Quadtone RIP

> 2nd window of print preview:
> I can choose" Mode-QuadTone Rip" and this is the point where I can't access the curves that are in this window.

JP, are you saying there are no curves in the Curves1, 2 and 3 boxes?  If so I would try re-installing again.  My memory on Tiger is a little hazy but I think the Epson portion of the driver is close enough to the Leapord version for government work.  It sounds like things are OK.  When you ran the Install 4000-UC command were all of the txt versions of all the profiles(curves) in that same folder including the   The illuminata alpha smooth, assuming that is the paper you are using.

I'm a bit confused by your post as well.  Did you print a stepwedge through the illuminata profile with QTR to get the text file for the ICC profile but now you are unable to print through QTR.  You can try using the QTR_Gray_matte_paper profile and see if that works.  That would normally be the profile (curve) you use in order to print a stepwedge through QTR to get the txt file to build the ICC profile for softproofing.