passing prefs from client to server

I want to pass preferences from the client to the server on connect, i.e. in the GUI you select a vehicle, weapon, skin, race, whatever. This is stored in your preferences. On connect, I want to pass this information to the server, because depending on what you selected, a different player shape will be created.

I've looked everywhere and not found anything. I know it's possible to use commands to server, but that requires I don't create the player object right away.

Any go on this? Think preselecting your race in RW, so you start as an Orc or Human, not choosing your race in-game.