There are some changes with OpenCollada versus the older one, mainly with turrets
Firepoint needs to be named multifirepoint (same with the individual points)
The helper needs to be linked to the turret arm rather than the base
Also this was written back in '09 some of the details may no longer be correct (like the "-node" bit, no longer necessary). I can't guarantee the glowpoint thing still works or not, I haven't used them in ages.