The devices supported by this package are Galaxy S3 (GT-I9300, GT-I9305,
SHV-E210K/L/S) and the Galaxy Note 2 (GT-N7100, GT-N7105) - a family of
boards also known by the codename "Midas" - and the Galaxy S2 (GT-I9100)
From this list, only the i9100 doesn't support the bootimg method.
Because of this, this kernel package is using the isorec method for all
the devices on the list. Additionally, for the midas devices, there is
no problem with this because the boot.img file is, in fact, a copy of
the kernel+initramfs on the pmos boot partition and what the isorec
initramfs does is actually to load the initramfs on that partition
directly (at least on my understanding).