512mb is big enough to work, unless you fill it up completely. When you say format program, do you mean the one in windows? I know there was another program that everyone would link to but I don't know where to download it, etc.
A debugger. You don't need it though. Get the cheat files from that site, run them through codemanager to export to gct and place them in root/codes.
In gamma change hook type to VI.