Need pics of such said Luke, but to get it to float you nee to reduce spring tension, take out a spring and do a minor set up, may have to tweek truss rod once you remove a spring, hope this helps, i just set my Luke up not to float.
What did you do to stop it from floating?
Just do that thing vice versa and you're done.
What exactly do you mean by "the tremolo is really stiff"?
If the tremolo is lowered to the body then the spring tension is usually higher, so you need more power to push down the bar.
Seems like you're asking the same question twice:
If you reset your whammy to float, the whole system will loosen up automatically.
To get the trem to float you need to reduce the spring tension. Currently the tension there is holding the bridge flush with the body, so reducing it will cause it to float again.
There are two ways to reduce the tension - unscrew the spring claw; or remove one or more springs.
The first option is the easiest, and most likely to do the job unless extra springs were added when you had your original setup done.
Inside the trem cavity you'll see the springs attach to a claw which is screwed into the body of the guitar at the neck side of the body. Unscrew the claw (just a bit at a time, don't go anywhere near completely unscrewing it), then retune the strings, and see if the bridge has raised up.
If the bridge is still flat with the body, repeat the above, but if you have done this more than a couple of times and it is still flat then it is likely that you'll need to remove a spring completely, so reverse what you have done to this point, remove a spring and then carry on.
If the bridge is floating too much, then back the claw in a little and retune again until it is floating in the position you need (normally a Luke trem will float a few mm off the body).
If the bridge is floating, but not enough, then unscrew the claw a little more, retune etc.
It's a combination of the spring and string tension that will get the bridge floating again.