Originally Posted by shadowriath
slenderbodyf_v11's (Slender body for female v.1.1) appearance.2DA.
For some reason, the 2DA file included in this Mod is in the old plain text 2DA V2.0
format (used by NWN but still supported, though unused, by KotOR), rather than the new binary 2DA V2.b
format that KotOR uses.
While using plain text 2DA files work, they are somewhat slower (and much larger) than their binary counterpart, so I wouldn't recommend it. The format isn't used by the KotOR games for a reason after all.
And, as you noticed, the KotOR/TSL modding tools only support the binary format, which may make your file incompatible with some mod installers if you try to install other mods later.
Anyway, if you wish to keep this appearance.2da
file as it is an only edit it, any text editor should do the trick.