Developer website: Infinity-to-the-Power-of-Infinity
MacBoot is an application for changing the gray apple shown during system startup to any image or icon. It is also possible to change the background. The program can use boot images created by others and made available from sites such as ResExcellence, but it is also very simple to create your own using drag and drop.
Version 1.0.6 adds support for some systems with deviating BootX files, including certain iBook G4's
Mac OS X 10.2 or later