Yep, Rome wasn't made in a day. Besides, we must face this as a hobby not a work thing. Right now I've only experimented visual effects on blender, but next week I'll start adding ships to the game's library and send them here.

BTW: I think I found a way to change ships: make a small cube in which are all the properties of the ship (actions, reactions, etc) and add a "replace object" actuator that gets the ship model from another layer, or scene, if possible. On the selection menu we have all the ships and each has one propertie assigned to it. You click on the ship and the correspondent propertie changes thus replacing the cube on the race scene.