This can certainly be done. The main tools are:
Model > Duplicate > repetition (for straight extrusions)
Model > Surface > Extrusion (along curves)
See the Modelling user's guide pages 183-189. There are several examples.
Matt
Matt Lind
Animator / Technical Director
Softimage certified instructor:
Softimage|3D
Softimage|XSI
speye_21@hotmail.com