Its a piece of cake, I cant understand why people struggle with this so much. I have never changed strings one at a time. I have never used wood block tricks. I just changed mine out from 9's in standard tuning to 10's w/heavy bottoms and tuned to D. The entire thing counting cleaning and waxing the guitar took me one hour.
I dont like D tuning BTW... to muddy and not enough punch.
I dont use my floyd equiped guitar much anymore because my new guitar sounds better and hangs more to my liking than my old guitar. But I do miss my floyd and the fine tuners. I have more problems keeping this conventional guitar in tune. The old Kramer, I can grab it once a month to play, tweak the fine tuners just a bit and its ready for war. This new guitar goes wack over night and will one day have either a Floyd or Kahler locking system.
Do a search on the Floyd here, I have explained the process a few times. It just takes logical evaluation as to whether you need to keep tuning or adjust the spring tension.
If you are just changing strings, not gauges or tuning and you were set up properly before the string change you should not have to adjust anything. Just bring the guitar up to tune in the tedious logical method necessary for a floyd and lock down the strings. Good to go for 3 months.