I think so, yes. How is the tube created? A model or a terrain? You can try to do it via Ecosystem but it could be that the tube sides are too steep. If that does not work you will have to do it manually i fear - load the model, load the animals and position them. For the ecosystem (good for the manual positioning too of course) you will need to load the animals and save them as vob first. Best with the option "incorporate texture maps". Then you will have no problems later.

One day your ship comes in - but you're at the airport.