Ive been doing a little bit here and there with this mod myself. Not to usurp it. What i have been doing has been for my own personal use so far. Like cleaning up the relic models. Re-UV mapping them, and adding the proper team/stripe color textures directly from the original lif textures. I would show some screenshots but 1.04 broke all the mods.
One suggestion i should make is to NOT increase the size of the textures. Stretching a 256x256 res texture to 512x512 just distorts it, and makes things worse. Plus it adds to the memory taken up to load them which IMO is a waste. Leave them the original resolution. They are fine as they are. If you want higher res you will have to create your own textures.
I can offer you what i have done so far. I just have the kushan support frig, attack bomber and carrier done. Carrier still needs some work. I am having a hard time re-mapping that one. Lots of mesh errors, and texture gaps. Other ships including the mothership have similar mesh/texture errors. The mothership is in terrible shape (for use in sins). The average person prolly wont notice the mesh errors but i do 
I am also importing some HW2 stuff, but i wont release them because i dont want any nice cease, and desist letters from relic
I will post shots tho when i can.