QTR-Quadtone RIP

Hi,

First off all, sorry about my english.

I'm trying to make my first QTR curve (neutral) just now and have:

Epson Enhanced Matte
Epson 9800 with original UltraChrome Inks and MK
Eye One

I Know some of you may be tired with beginner questions but it's  
inevitable... I swear that i've tried to get all from Tom Moore  
tutorial but I really can't.

Well, I've printed the first ink pattern calibration and found that  
65% is the point where the MK Lab values (measure tool) reach it  
maximum.

Printed the second, 65%, ink pattern and found that 100% LB =  24% MK  
and 100% LLB = 35% LB . Ok?

My questions are:

1. am I in the right way?
2. Do I need to found relative densities for color inks? (I want a  
neutral profile) if I need: what's the way ?
3. at Create Curve dialog Box what is "limit" and how I determine it?
4. What is the next step?

Thanks for the patience,

[ ]s

Antonio Garcia