Texture-specific questions

[Treewyrm]

I have finished modelling a new ship, made uv mapping and now it comes the part where I need to paint textures. I didn't dig much into the way Freelancer works with textures so I have a few FL-specific questions:

1) What texture size do you normally use?
2) Is it possible to use non-1:1 size aspect ratio? For example 2:1, as in 1024x512.
3) I've seen some planets and ships having self-illuminated areas (like lava rivers on planets), is it done by self-illumination map or do I need separate texture just for those areas?
4) I've seen Nomad Lair having variable opacity on "web" surfaces on it's side. Can I combine both opacity and self-illumination maps on a single surface?
5) Again Nomad Lair features panning textures, is it possible to use this effect on ships/stations textures?
6) And again Nomad Lair also have two-sided surfaces, that "web". How do I make two-sided surfaces without cloning and flipping polygons?