Gill, you can simplify base shapes of this spaceship and you will be able to replicate it in MoI, just use Loft for that base shapes, check here I made a lot of tutorials about that forms: http://moi3d.com/forum/index.php?webtag=MOI&msg=6058.1

All other stuff of this spaceship is not a problem for MoI.

If you are going to try other software, you can start from SolidWorks.