I think this article was published before Samsung released jb 4.1.2 with preload filled with bloat. To be able to dual boot 4.1.2 you need a modified rom and dorimanx kernel.
Dori 8 will only run jb so iCS will not work.
Dori 7.5 was the last version to run ics and it could also handle jb.
I have some vague memory of running neatrom ics with some modded jb rom as second( mayhap chameleon 3.01) with this kernel. The question is : would neat rom xwlpy 3.4 as first and neatrom xwlsz5 (jb modified) as second work together?
Has anybody tried?
Will report back if I try.
Sent from my GT-I9100 using xda premium