Well, it will to an extent, Clanmod is arguably the least game changing one. Saber styles, force powers, etc should still be the same though. Still, it shouldn't change it
too much, I suggest just checking it out for yerself really
As for files getting corrupted, make sure you install it properly. Readme should have install instructions. Whatever you do, just don't overwrite any native game files
If you like, I can show you Clanmod on my server. Haven't got TheLastHope installed anywhere right now though.