You'll need modelview, Truespace and PCS (Links to all three should be in my FAQ).
Basically.
1) Use ModelView to open up Sparky_fs2.vp and extract the ships you want (Simply clicking on the pof-editor button is enough to start extracting them). If you know the filenames of the ships you're after you can use VPView (or similar) for this step instead.
2) Open the pof in PCS and choose the pof to cob option from the menu.
3) Open the cob in Truespace. Select the model and use the arrow keys to cycle through the submodels. You'll probably want to delete the lower detail levels and debris so that you're just left with the ship and it's guns.
4) Twist and turn the model around till it looks good and then click the render button
