i found fdisk for nokia 770 here : http://repository.maemo.org/pool/mae...7osso2_arm.deb
i have installed it with root on xterm : dpkg -x util*.deb /
and now i have fdisk
i repair the mmc partition with fdisk (type n p 1 enter enter w) and created my fat with mkfs.vfat -F 32
now, i will try to have a swap partition to have more memory for the nokia 770