SDPatch

SDPatch is a tool that installs a small loader into a separate partition of an SD card, which gets loaded by the cheat code. While the loader installed was designed to load SDLoad, it loads a file in the filesystem that can be freely modified.

While the PC version of SDPatch only works on a few versions of Windows, there is also a DOL version of SDPatch that can be run on the GameCube itself.

Command line usage

SDPatch.exe <drive_letter>

drive_letter includes both the letter and the :\ that comes after it.