Digital BW, The Print

I'm using:

PrintFIX PRO 2.0
Epson 2200
MIS UT-3d inks
QTR-Create-ICC-RGB.app (Mac)
Embedding_Photoshop_Curves_in_ICCs.pdf
UT-3D_Readme.pdf

If I am reading the instructions properly, I should follow this  
sequence:

Assume the curve I want to use is called MyCurve.acv

1) In Photoshop:

      Open "rgb-raw-16.psd"
      Image>Adjustments>Curves>Preset>MyCurve.acv
      Save As: "rgb-raw-16.raw"

      Open: "Step-21-gray.tif"
      Image>Adjustments>Curves>Preset>MyCurve.acv
      Print "Step-21-gray.tif", no color adjustment; other values set  
for final prints

2) With PrintFIX PRO 2.0:
      read lab values of printed scale
      save values in "MyValues.txt"

2) On desktop:
      Drag "rgb-raw-16.raw" and "MyValues.txt" onto QTR-Create-ICC- 
RGB.app

RESULT:  "MyValues.icc" on desktop

Is this sequence correct?

If it is, am I correct in assuming that I can profile any of my  
papers starting with the following curves? ---

matte papers   --- "Start_matte.acv"
glossy papers  --- "Start_glossy.acv"

And finally, how do I "tweak" profiles I have created in this way?

Suppose that I started with Start_matte.acv, went through the  
profiling sequence, and ended up with "Start_matte.icc".  Suppose  
that I then decide I would like to tweak it a bit.

How do I "tweak" my first attempt at linearizing? At that point I  
have the PrintFIX PRO readings, the original adjustment curve, and  
the final ICC, but not the adjustment curve represented by applying  
the PFP readings to the starting curve.


Myron