Easiest and cheapiest way is to just sandbag it in place, assuming you don't have a pistol block and vise, then fire a fouling/cold bore shot, fire another round after a few seconds, then make an adjustment and continue until you are on target.
As mentioned above, sighting in a .22 should be a cheap and fun experience. It shouldn't break the bank to do so or you are doing it wrong.
JD