I install it to my UEFI disk in an ext4 partition (not formatted by the installer), directly run after installtion works (except for my FocalTech touchpad which requires newer kernel, but I have separate PnP USB wireless touchpad keyboard combo which works), however it doesn't register itself to the EFS partition. Its partition contains android-4.4-r5, grub (which seems to have standard grub 1 files) and lost+found folder. Upon installation this is what I answered:
Do you want to install bootloader GRUB? Yes
Do you want to install EFI GRUB2? Yes
Do you want to format the boot partition /dev/sda1? No
Do you want to install /system directory or read-write? Yes
How can I manually register it to my EFS partition? I have two working Linux installation.