You aren't trying to compress the rings over the locator, are you? The pin that's set into the piston?
Otherwise, the rings should easily squeeze into the bore with your fingers.
As noted, put the rings on the piston, one pin clip in, the piston in the bore then put the whole mess over the studs. Line up the pinhole, put in the pin and insert the second clip.
Note!! Be sure to have the crankcase protected with a towel or somesuch so when you drop the dang circlip, it won't fall all the way to the bottom of the cavity!!
Rings are supposed to be the same thickness (on the 'H' model, anyway). Marks up...although that's kind of a given with the ring type. If one ring has marks and one don't, put the one with markings on top.
After you get the piston started, use your fingers thru the intake port to ensure the rings get smoothly past the port.
DO NOT reuse pin clips. If you are installing a wiseco, make sure the pins 's-n-a-p' into place.
Did'ja get it done by now?? All set?