About ripping models from the NSBMD viewer: You have to use it in tandem with an OpenGL ripping tool. There's a tutorial on the internet somewhere.
About ripping from certain Gamecube/Wii games: Super Mario Sunshine, Mario Kart Double Dash, Zelda: Wind Waker, Zelda: Twilight Princess, Super Mario Galaxy, and Super Mario Galaxy 2 all use the same graphics engine. thakis has created a program that exports models from all these games into a usable format, but I must warn you that the community thakis is from does not like it when people release models created with simple conversion utilities. Don't make the same mistake I did! It'd suck to see tMR get curbstomped by a much larger community.
About ripping from certain Gamecube/Wii games: Super Mario Sunshine, Mario Kart Double Dash, Zelda: Wind Waker, Zelda: Twilight Princess, Super Mario Galaxy, and Super Mario Galaxy 2 all use the same graphics engine. thakis has created a program that exports models from all these games into a usable format, but I must warn you that the community thakis is from does not like it when people release models created with simple conversion utilities. Don't make the same mistake I did! It'd suck to see tMR get curbstomped by a much larger community.