It depends on the server. Most server sate which mods may be used or none at all. If it is not stated play it safe don't use a mod.

-~-~-~-~
There is no Silicon Heaven! But where do all the calculators go ?

You could no more evade my wrath... than you could your own shadow!

You cannot use custom ships or anything else custom (as in new - not in the original game) upon servers unless they have the same mod running as well. This means that you cannot log onto a server and fly that ship, as to the server it jsut won't exist.........and therefore crashola.