There are others who have reported similar problems with PCS2. If you can't get it working this should help.
Blender .cob export
The python export script goes in the scripts folder (Blender\.blender\scripts) You need to install python as well.
http://www.python.org/Model orientation uses Blenders orientation.
Press numpad 1 should show the front, numpad 3, the nose pointing to the left side.
Everything is parented to detail0. Check that each object has scale and rotation applied. Before exporting select all and then Apply scale and rotation (CTRL-A)
Every mesh object can have its own auto smoothing angle.

Set up a turret like this. PCS2 will auto generate from this. It's worth a shot with PCS1. The firepoints are lamps

To combine several mesh pieces into one object, parent the other pieces but put xxxx- as a prefex to the name. The script will skip group generation for these pieces. In Truespace terms they don't get a light assigned to them. Debris0 is made from three objects, each with its own texture.

When the time comes to export, select detail0 and the hit a twice, so the name turns white.
Textures - Whatever is assigned in the UV editor is the texture PCS will see. Assigned materials are ignored.
Set PCS to import 1 to 1
Hopefully enough is covered, Its been a while since I used it.
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