[KERNEL] Dual Boot your Phone !

This Dual Boot Kernel are based on Nexus Kernel RC2 BigMEM with some modifications to make it boot from your sd card !
At the moment, there is only an modified Kernel for Jelly Bean 4.1.2, but if something want I can make a Kernel for GB, ICS or 4.2.2 too.

Note: DO THIS ON YOUR OWN RISK ! I RECOMMEND A FAST SD CARD; OTHERWISE YOUR SECOND ROM WILL RUN VERY SLOW !

Installation Guide
1. Partition your external SD card :
First partition is the partition for YOUR data
Second partition have to be an 1GB ext4 partition, its for /system
Third partition have to be an 2GB ext4 partition, its for /data
And partition number 4 have to be an 300 MB ext4 partition, its for /cache
For partition you can use Easeus Partition Master, link below.
Its very important that the partitions are in the right order, otherwise insatllation of rom fails.

2. Download the boot.img (link below) and Download the rom that you want to have on external SD
3. Replace the boot.img inside the rom zip with my downloaded one
4. Download the modified Kernel and your normal Kernel (very important) and put BOTH on your phone
5. Put the rom zip file with my boot.img inside on your phone
6. Reboot to recovery
7. Install the modified Kernel
8. Install the Rom
9. Maybe install something like gapps or mods

Now you can reboot your phone and it should boot the second rom from sdcard !
If you want to boot the rom which are installed on the internal memory, just reboot to recovery and flash another, unmodified kernel.
If you want to boot the rom which are installed on the external SD Card, just reboot to recovery and flash the modified Kernel.

Downloads:
Kernel: https://sourceforge.net/projects/dua...D.zip/download
Boot.img: https://sourceforge.net/projects/dua...t.img/download
Easeus Partition Master: http://www.chip.de/downloads/Easeus-..._32927259.html

Credits: biagio7xD for Kernel