Drop .XBG file onto the tool, use command line or batch convert them.
This will make properly converted models with skeletons and all parts placed to their bones and having weights.
Note that this tool only converts individual XBG files, and both cars and characters are combined from multiple XBG parts, to support many different combinations. Like premium hoods/bumpers etc for cars, and outfits for characters/NPCs. Finding these parts for particular car/char will require parsing archetype files, I will provide tools for that soon.
Examples of complete models:
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Characters:
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