Datacolor User to User Support Group.

Hi all,

I have a odd silly question in regards with the whole targets used with Printfix Pro spectrometers.

I've got some 6 Eboni inks from inksupply in my R1800 printer, which are different shades of black, dark brown and cyan's (NO RED or GREENS, MAGENTA). I was wondering if I were to print the normal "FAST TARGET" of 150 patches on 1 Sheet, (knowing full well the "FAST TARGET" encompasses many myriad of red, blues, green, (etc) colors) on my 6 Eboni ink R1800 printer. 
What purpose if any would this be in measuring this outputted target?

If I did measure the target, would I be able to make an ICC profile based on my 6 inks? 

If I loaded this ICC profile into Photoshop and used it as my RGB color workingspace, would I know my color gamut and see if any clipping occured(View:Gamut Warning) in any my images? Like I said above Eboni 6 inks, (black. dark browns and cyans), say I had loaded an image with Red roses, then all the Red in the image would show up as Gamut Warning?

What would be the purpose of all this you ask, well I want to know where my colors lie in the colorspace and utilizing the maximum part of the colorspace, in the interelated inks I have.

Cheers
Jag24x