QTR-Quadtone RIP

Thanks again for advice.  A few more questions if I may.

(i)  I'm hoping to produce a 1440 curve for EpEnhMatte, since the 2880
curve seems to use too much ink for this paper.  Is there any point in
trying to base a 1440 curve on an attempt to simulate a Cone-produced
2880 curve, either by using ACV files, or by entering points?  That
is, will such 2880 curves inherently make the ink limits too low for
1440?  Would I be better simply to try and create a 2880 curve and
lower the limits, based on the ink separation page?  

Perhaps another way of asking this question is whether the individual
curves that you enter for each ink are absolute or relative curves? 
Hope this makes sense.

(i)  Are there any software or Excel tricks for taking two columns of
data and producing the "xx.xxx;yy.yyy" pair that are required for
entering points in QTR?  And conversely, i.e. for taking the pairs and
producing columns in a spreadsheet?

Ferdinand