First: Have you had the training for mounting bindings?
Second: do you have the salomon book?
if you have said no to either of these questions good luck, the test it's self is not too hard but some of the questions are really specific to certain models. The test for salomon is in the back of the tech manual, the shop should have a copy if they deal in them, you can make a copy of the test, fill it out and then mail/fax it in.
If you can get into the VermontSki Mechanics workshop, this will get you the info you need, at the end of the classes you take a test over all mfr's, tho you will still need to take the marker test seperatly.
If you have any specific questions I can probbably get the info, IM if needed.