1. How much is -0.200000 on the regualar rep scale?
0 is fully neutral. -9 is completely hostile (Without changing a character file in the INI's), 9 is completely friendly.
2. Where are the SP factions that I can make into new ones?
They'll be in there. You'll notice they're different because they won't have many empathy_rate entries. You'll need to look at the codes too. li_n_grp is Liberty Navy, li_n_guardian is Navy Guard, for example.
As to your crashing, many, many MANY things could cause a FL crash. Usually when we mod we mod a small amount at a time, so we know what causes a crash. You'll need to work backwards and figure out what's causing the crash.