[Dualboot][KitKat support][4.4.x]DorimanX kernel 10.43v48 still in test[HowTo]

Hi,
we have some good news before chrismas and before new year , and i want to share it :)

you know me as a dualbooter for 4.1.2 jb sammy rom.

now i switch for 4.4.x dualboot with last version DorimanX to test here :

http://www.dorimanx.com/beta-test/

last kernel i test : http://www.dorimanx.com/beta-test/ke...I-PWR-CORE.zip

how to dualboot two 4.4.x kitkat roms ?

what i have :
two 4.1.2 jb roms : neatrom 5.5 and jellysnap v6

what i have done :
(base kernel : dorimanx 8.43v47.)
make nandroid of two 4.1.2 roms.
- in each backup folders, delete sd-ext files and delete referenced lines with sd-ext file (two lines) in nandroid.md5 file from each backup folders
- i choose SlimSaber-i9100-4.4.2-20131219 and CARBON-KK-Myself5-20131217-2003-i9100 roms.
- in each zip, i replace boot.img kernel file by zImage from DorimanX last buils test renamed as boot.img. put the two ZIPs in Sd-EXT CARD.
- i boot my tel in recovery (6.0.1.2)
- i restore old nandroid carbon 4.3.1 i have in 1rst rom (dorimanx 8.43v44)
- i reboot recovery 6.0.1.2
- i flash kernel-cm-10.2-20131112-i9100-signed the most important thing to do before a flash of 4.4.x rom in 1rst rom
- i reboot recovery 6.0.4.5
- i flash CARBON-KK-Myself5-20131217-2003-i9100
- i reboot in recovery (remember i have dorimanx boot.img flashed too)
- i flash Kernel_Dorimanx-V10.43v49-[14-34]-[20-12]-JB-SGII-PWR-CORE.zip
- i reboot the tel, CARBON booted fine and was OK.

- i reboot in recovery.
- made nandroid from 1rst rom
- i delete sd-ext files and delete referenced lines with sd-ext file (two lines) in nandroid.md5 file from CARBON backup folder
- i restote nandroid to 2nd rom
- i reboot in 2nd rom
- CARBON 2nd rom booted fine and was OK
- i reboot recovery

- i re-flash kernel-cm-10.2-20131112-i9100-signed the most important thing to do before a flash of 4.4.x rom in 1rst rom again :)
- i reboot recovery 6.0.4.5
- i flash SlimSaber-i9100-4.4.2-20131219
- i reboot in recovery (remember i have dorimanx boot.img flashed too)
- i flash Kernel_Dorimanx-V10.43v49-[14-34]-[20-12]-JB-SGII-PWR-CORE.zip
- i reboot the tel and choose 2nd rom : CARBON booted fine and was OK.
- i reboot the tel, SLIMSABER booted fine and was OK.

even i have change image kernel in 4.4.X ROM ZIP before flashing 4.4.x rom, i reflash 10.43vxx to avoid some trouble i have with SuperSu before posting this method.

thats my story today and thanks to @dorimanx for 4.4.x support (still in test for now)

the two 4.4.x roms installed are dualbooting fine.

thanks