[Q] Help For Installing Application In MMC ?

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http://forum.xda-developers.com – HEY guys whats up ?/ guys i have a problem i updated my neo v to 4.1.B.0.587 today and i tried to root it but getting error in flash tool ?? can u guys tell me how to root it ?? 2nd Most Important Question of mine is .. bros i wanna download my all apps in memory card is there any way to do so ..?? one more thin guys i don't know what is kernel ?? or what is the use of custom rom ? can u guys help me out to tell what these things are ?? also give me best custom rom for my updated version of neo v and really very sorry for crating this thread but this forum is so big and m c (HowTos)