bmp2icon is a tool which will take a 128x128 24-bit bitmap, and convert it into a ps2 memory card icon file. The resulting icon is a selectable shape with your bitmap "wrapped" around it. In the current implementation, the following icon shapes are available: 3D cube, 3D rectangle, flat square.
Currently only the win32 version of this tool is available, as the command- line version is out of sync. The next release will include a win32 binary and C source for the command line version.