Follow Rich's tuning guide to the letter.
I don't think anyone could explain it any better. He has it step-by-step exactly what you have to do to tune, and keep in tune, any FR type floating trem.
They are/can be a pain in the tucas when it comes to changing strings/tuning up, but once tuned, barring any problems with the guitar, they will stay in tune.
My '90 RG 550 is beat to hell with cracks in the body/neck and I can still play her do death and never go out of tune.
"Best bridge; ever!" (Comic Book Guy impression)