Been poking arround the SFX system of SH3, and the stuff LSH3 adds to it.
Apparently it doesnt modify the .zon files of ships, it just adds a bunch of textures and the particles & materials files.
Adding these and some minor changes to GWX's zones.cfg file shoud be enough...
Note to self: while poking in GWX's zones.cfg, remember to reduce the ship sink time a bit. half of current GWX values would be nice. I hate having to wait arround for hours and hours for a ship to sink.