“This is a tool to run homebrew EBOOT programs on your v2.0 PSP. It will not run on any other firmware version. It’s very much work in progress, but can load quite a lot of existing EBOOTs… later Tetris was released “…a simple Tetris clone, to experiment with the recent TIFF overflow exploit, and get used to the PSPSDK compiler tools. Just unzip the file into the root directory of a memory stick, then use the PSP photo viewer to open the “Tetris” folder…” Link.