How do I hold the integrity of CMYK colors in and out of XXP?

[davelash]

I'm fairly new to CMYK and I'm in stuck in quicksand! I set out to take 5 prescribed CMYK colors and develop a full CMYK color palette around them. But I can't even get started because I can't bring colors in and out of XXP intact:

1. I started with two tiffs in Photoshop which contain the 5 given colors and used the PS color picker to derive the CMYK formulas. (The desired formulas are noted on the attached image.)

2. When I imported those tiffs into XXP, the XXP color picker gave me completely different formulas. Nevertheless, I created 5 squares and filled theme with the original formulas which I had first entered into the Color Gallery.

3. I then sought to confirm the formulas with the XXP color picker: the results were completely different formulas -- close in some cases, but not that close.

4. I then exported my XXP file to a new tiff and opened it in PS. The PS color picker then found a new, third set of formula.

I'm clueless what is going on and what to do about it. I've been reading everything I can find about CMYK but nothing is shedding any light.

I'm attaching the xar file -- apparently the board won't accept a tiff but here's a download url if that's of any help: http://www.mediafire.com/?fz3nn2myznj