I know nothing about 3d art but a friend of mind showed me a prog called ANIM8OR it is a tiny as and free program from
www.anim8or.com
after a couple of hours useing this program I managed to make the ships i have attached (hopefully).
This program does purly what you want puke modify spheres and other polygons.
problem is it has no support for textures just straight colours.
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CyC
L+++ GdY $!+ Fr+ C--- S* T!- Sf++ Tcp++ A? M++ MpM RV Pw+ Fq++ Nd+++++ Rp++ G