BMP2BNR converts a 24 bit per pixel bitmap the GameCube's banner image format and injects it into a banner file.

Usage: BMP2BNR.exe <Bitmap Path> <Banner Path>

            <Bitmap Path> = The path to the Bitmap File to import (must be 24 bits per pixel and 96x32)
            <Banner Path> = The path to the Banner File to import the image to

Example: BMP2BNR.exe "C:\Users\Cuyler\Pictures\Picture.bmp" "C:\Users\Cuyler\GameCube Mod Folder\opening.bnr"