Hello, I have already Windows XP installed on my AOA150. And i don't want to format my harddrive and lost my Windows XP ... In addition there is an invisible partition who can restore my Windows on my netbook. If I want to install a retail Snow Leopard without reformating my harddriver with GUID partition. I found a way ... modified the OSInstall.mpkg file but It didn't work at all for me ... So can someone help me please ?