I have 3 iso's, arch linux, gentoo and freebsd, I wiped my usb drive, then dd'd sg2d to my usb drive, I then created the partitions I am going to be using, then i backed up the mbr and the partition table with dd, joined them with cat, then used unetbootin to install each iso to their respective partitions(using ext2), i then restored the mbr+partition table with dd. s2gd boots and everything except "detect any os" works, it errors out with "error unknown filesystem", would anyone have any idea of what i'm doing wrong ?