As you read this, you may think that there is no way to enter other than no-clipping...BUT you are wrong because when you go to the Russian side of the space station (do this from the outside), you will see a cylindrical thing poking out from the top of the space station. Hover over the top of the hollow cylinder and crouch as you are dropping onto it... Then press 'E' to open the hatch... when you are inside, press 'E' again to the closed hatch to get into the space station! and now as you finish this you may have just figured out that there was an entry point after all!!!