BMD File: BMD or BDL model file you are going to import.
Bone Thickness: adjusts thickness of bones for imported model.
Allow mirrored textures: enables mirror tiling for certain textures and automatically adjusts their offsets and scale.
Force create bones: Bones are always created, even for models with no bones (or just one). Some models, like doors may have animations and this option allows convert them.
Save Animations: if checked, script will convert .bck animations it founds in bck folder extracted from the same package. Depending on a number of animations, it may take a long time.
Export textures: if checked, script will extract textures from selected model. Uncheck it if you receive an error, saying it cannot generate textures, then use BMDView2 to get them.
Include scaling: the script will create dummies inbetween bones for correct scaling in 3ds Max. However, this increases bone count and can cause issues with another software. It should be unchecked, unless you are sure that the model has scale animations.
character export (modeling) - creates the character assembly and animation files.
.X export (games) - creates an .x file in the same path as the .max file which contains all the models, textures and animations. Requires the kW x-port plugin.