Don't use the snaproll button - it is a crutch and won't teach you a proper snap.
The basic snap is to just slam the right stick into one of the lower corners and feeding rudder in the same direction, but it is still not the correct way to snap. A correct snap is a very difficult thing to master, but since you are talking about doing it wit a "not so aerobatic plane", here are a couple things I found that I need to do to get snaps to look right on an Ultrastick, which is what I consider a not-so-aerobatic plane. I have to have servo-binding full throws in the rudder and elevator. I cannot be at the noseheavy end of the CG, and I have to dump the elevator, then dump rudder as I am releasing most of the elevator and dump the aileron just slightly after the rudder (so close it is practically at the same time). By the time the plane get's 1/4 of the way around, the elevator is neutralized and I am just holding the rudder and elevator. when it comes time to stop, I neutralize the aileron and bump a touch of opposite rudder and then neutralize the rudder. This is the only way that particular plane will start to gyrate immediately. If I just slam the sticks into the corners, it does 2/3 of what looks like a barrel roll and then finally starts to gyrate - doesn't look as good.