@ damnesiac: this site cant help me. i have guid and efi ! not mbr. so chain0 cant find the right partition to boot. or xp loader dont find it.
@ rfuilrez: i know your way, but my board cant boot via f8, i have to press del - 5 clicks for setting up the primary hdd - f10 - reboot - an then i have Mac... this is not the best way

i wait till rev2 and set up a new leo with mbr and then i will try chain0 again