I have managed to find a solution to the invisible hard points bug for the space stations.

It's very simple and has worked for me everytime.

1) You need to use fighters to destroy the hard points so keep them alive until you think you've destroyed enough enemy units to go for the station as it's ONLY fighters that can destroy the station's hardpoints if they're 'invisible'!
2) In order to target the so called 'invisible' hardpoints just zoom right in on the station so that it's the only thing visible on screen. The hard points will be stacked up in the top left corner of the screen.
3) Target the hard points with the fighters.
4) The destroyed parts can be seen blowing up in the middle of the map, strange...

p.s This will NOT happen in the full game as the full game has all the space station models.

hope it helps... :)

Moved to proper section :)