I'm not sure of all the tires planned for the 60mm setup, but like rider said, it's really easy to trim the 2.2" tire bead off and mount to the new wheels. You will just need to newer 60mm inserts/wheels.
Btw...It's splitters
Perfect. i didnt know if that would work. I will do that when needed.
I have used another brands insert made for the new rims in the 2.2 tires for a flatter profile and they have been working well there.