Anyone recognize .BAD or .BAH archive files or know how to unpack them?

[Scar7752]

I'd like to replace textures of the 2003 game Hot Wheels World Race(yeah yeah judge me if you want, it's a fun game), but I'm not sure how to crack open the game. It looks like everything is stored in "harchive.bad" and "harchive.bah", and the game was made by Climax Studios.

Halp pls?