I recently tested the compression on my car. I simply bought a compresstion tester at a local parts shop. It's no big deal.
The only slight problem with my tester is, that it can be bard to screw the hose in the plug hole, since the tube its flexible.
Other than that, remove all plugs, disconnect fuel pump, always test with full throttle, and run on the starter the same amount of revolutions for each cylinder tested.
Good luck
