Sorry about that, hit the wrong key.
There are different sorts of tremolo systems - Khaler, Fender, Floyd Rose and some others. Some are easier to set and stay in tune than others. Locking tend to be better.
If you are not familiar with how to do it yourself, get someone to help you the first time - either a friend or a tech as when set up badly, they will just not perform properly or stay in tune. Also is is easier to uinderstand when someone is doing it in front of you. Much better than an written explanation or pictures on the web.
Maybe something to consider at the next meeting - some demos on basic guitar setups.
Cheers,
Mark.