Digital BW, The Print

I have an X-Rite 810 densitometer that I got to create paper curves 
with QTR, but for the occasional color print I wish to create a PS 
curve to profile my printer. This is my planned procedure based 
entirely on something I remember reading somewhere at sometime in the 
past; so I wish that you friends will correct me if I'm heading in 
the wrong direction based on your experiences.
1. Using the Gretag/Macbeth image file from some source (?) print it 
out on my printer as I would normally print a color image.
2. Scan it
3. Open it in PS.
4. Reading the gray squares on the bottom line, create a curve in PS 
to bring the readings to the readings of the original GM file. 
Assuming this will also bring the color squares to match the original 
readings of the GM file.
5. Apply this curve to my color images just before printing from PS.
6. Print settings for PS:
    A.Document source: Adobe RGB
     B: Print space: Same as Source
7. Driver Settings for 1280
    A.Custom setting: Gamma 1.8 and sliders at 0 on Epson HW Matte.

Your friend in Photography,

Johnny