How to pull and put back the textures from the game Lego Bionicle Heroes?

Question

Textures

Hello. I want to upscale the textures (it would be even better together with the inscriptions from the menu) of the old Bionicle Heroes game, but I don’t know how to extract them, and, for sure, put them back is also a separate issue. Help me please. In programming and difficult terms I do not rummage.