Oh cool, thanks for the help. I've checked it out, and I still have a few problems:

What if say I wanted to lightmap a model room for example? The lightmap generator only seems to work for 'square models' or terrains.

What about static lights, apart from sun? I guess you could change the position of the sun for each light to make a seperate lightmap and then mix them all together, but tbh that seems like a bit of a pain.

Anyways, I guess this will be fine as a lightmapper anyways.