QTR-Quadtone RIP

This is really related to my other recent posts and is an attempt to further understand the process.

This is how I re-linearized QTR_1400_UT14_IGFS_ cool and warm using MIS inks to make a curve for Epson Premium Semi Gloss paper (EPSG)using Windows 7.

1.  Open the QTR programme.
2.  Click on Tools>Curve Creation.
3.  Click on File>Open>QTR_1400_UT14_IGFS_cool.qidf
4.  Click on Open.
5.  Click on Linearization.
6.  Click on Clear.
7.  Click on File>Save As>QTR_1400_UT14_EPSG_cool.qidf
8.  Exit Curve creator.
9.  Return to the QTR programme.
10. Click on File>Select Image>(navigate to the appropriate folder for)
    21step.tif and click on this.
11. Select A4, Portrait, 2880 dpi, Uni-directional and the new
    QTR_1400_UT14_EPSG_cool.qidf making sure Curve Blending is at 100%
    and 21step.tif is placed near the top of the page (to allow for
    subsequent print offs).
12. Place an A4 sheet of Epson Premium Semi Gloss in the printer and
    click Print.
13. Allow to dry for several hours.
14. Measure the steps (I use an X-Rite 810).
15. Open Curve Creation again and navigate to
    QTR_1400_UT14_EPSG_cool.qidf and open it.
16. Click on Linearization (it should be empty).
17. Enter the measurements from 21step.tif, starting top left with
    the "white" (paper white)measurement, following horizontally to the
    right, then following from left to right on the next line. The
    final value (black) on the third line at the left end.
18. Save this as QTR_1400_UT14_EPSG_cool.qidf and Exit Curve 
    Creation.
19. Return to the QTR programme and open
    QTR_1400_UT14_EPSG_cool.qidf,set the parameters as before and print 
    off 21step.tif below the first one on the paper.

Carry out the same procedure for a warm curve.

I would like comments on this approach using these papers, especially from Roy, Tom and David if possible.

I made a few "trial" linearization curves using QTR_1400_UT14_IGFS_cool.qidf as a basis but these don't appear in the Profiles folder of Windows Explorer - why would this be so as they appear in the QTR programme, Curve Setup, drop down menu? The "trial" linearization curves also appear here, even though I managed to delete them in Curve Creator - how do I delete them in the QTR programme (I am using 2.7.0.0 for Windows)?

Mel