Free and Easy Cheese sauce says it's 1.5 syns for 100ml made up as per instructions in my Slimming World bible. I bought some, and it's like very slightly cheesy watery wallpaper paste.
I would be carefull, I think if you ground it up it would become a flour based ingredient and knowing SW it would have syns lol. If you do want to do this, make it up as it should be with water, pour just the sauce over your chicken and give the pasta to someone else. We just get too cleaver sometimes for our own good with ideas don't we lol.