Good one, Gigantus.

renames the original game's data\animation directory
You mean in the data folder of the base/core game not the mod's data folder, yes? Why does it need to do that? I've never worked with animations so maybe that's a noob question.

The BAT file will generate the required IDX\DAT files at the first start of the mod
That sounds like it only happens the first time you run the mod. But wouldn't it generate them on every running of the mod? Or is this BAT only intended to be used on the first run, and after that players should launch it in the normal way?