Thanks for the guide with easy steps.
I am on Cyanfox KK Rom and I flashed Dori 10.43xxx. I tried Ehndroix and C-Rom installations on secondary Roms but somehow it never booted to the secondary Roms. It was either stuch at the Dori main screen or even if it passed that screen, it did not boot the 2nd Rom.
Then I tried cloning the 1st rom to 2nd rom and it worked well. Could boot to 2nd rom and make calls and stuff.
Finally I tried to install another Rom, this time AOSB (from Sooti) and it worked.
Any guess what I might have done the first 2 times? AFAIK, I followed the exact same steps all 3 times (with 3 different Roms) but only the AOSB could boot as a 2nd Rom.
EDIT: Whoa! Just tried your whatsapp trick and it worked. Really appreciate your efforts in coming up with this guide dude.