I can tell you exactly how a CR Showa setup works, because I've tried the same thing. The forks will fit in the lower clamp no problem. BUT, the forks are too small for the upper clamps. You will need to machine some sort of shim to take up the clearance, or have a top clamp custom made. The second problem is that the CR forks are longer than the YZ forks. You will need to slide them way up in the clamps, and you might have a clearance problem with your handle bars, depending on your bar mound heighth.
The stock YZ wheel and hardware will actually work, except that the caliper will be too close to the disc because the '01 CR's ran a smaller diameter disc. You would need to get an '00 disc off a YZ (should work, but never tried) I ran a complete CR wheel assembly to elliminate any problems.
Then of course, you will need to have a Honda style brake routing setup, which is simple enough.
I never tried to see if the CR clamps would fit in the YZ frame. That might simplify things. But then you would need a CR # plate.
As for performance, once you get them setup for your weight and ability, they actually work really well.
Anyway, if your serious about doing this, I might consider selling my setup. I haven't used it in a while, so its just dead space in my shop.
And just to clarify, these are '01 Showa forks, not Ohlins!