1. I explained it perfectly a while back, so there's no use trying to explain it again, since I might miss something
QUOTE
LO* files - LO* files are used for telling each frame where the graphic is placed,
don't pay attention to their extensions, the LO* files use differant extensions
so blizzard could give a group of LO* files for the same unit the same name,
even though they're the exact same format and have the same use.
2. I've never messed with that, some people say units.dat but most say sprites.dat