Try this:
Connect phone with USB cable to computer and start usb network recovery mode from bootmenu. Login via ssh and run this boot script:

$ modprobe mbcache jbd ext3
$ mkdir /mnt/new_root
$ mount -t ext3 -o noatime,nodiratime,commit=1,data=writeback /dev/mmcblk0p2 /mnt/new_root
$ cp /mnt/new_root/boot.sh /tmp/linuxrc
$ chmod +x /tmp/linuxrc
$ exec /tmp/linuxrc