The Unified Hiigaran Fleet Mod is a pretty basic idea, to combine every Hiigaran/Kushan/Kiith ship into one team.
I found a program by the creator of CFHodEd that converts Homeworld 1 backgrounds (.btg) to Homeworld 2 backgrounds (.hod). Most of the conversions look pretty good, I still need to fix the lighting on many of these and convert the actual level files yet but I have made a HW2 level for each with it's corresponding audio. For these I used the Crimson Bond level, until I have time to convert the remaining HW1 levels. So far mission 10 & 13 have converted level files & 13 has alll debris converted, just waiting to be added to the map. Top left in this image is from HW1 as a comparison shot.
i loved Karros... The backgrounds in Karros were allways the best.