QTR-Quadtone RIP

Hi guys!

I am new to QTR and I am trying do create some curves for my EPSON
2100 using Hahnemühle Photo Rag with the original UltraChrome ink.

Here are my questions:

1.) I want to linearize my curves now. Which file for measuring should
I use? 

There is a "21step.tif" in the "QTR"-directory and there are several
Step-21*.tif files in the "Eye-One"-directory.

2.) Which file should I use to create a icc profile?

There are 3 exe-files in the "Eye-One"-directory:

QTR-Create-ICC.exe
QTR-Create-ICC-RGB.exe
QTR-Create-ICC-RGB-bpc.exe.

Thanks for your help!

Peter