Angry [Q] Root Lenovo P780_8GB instructions for Dummies

Hi Friends,

I have no idea of rooting and installing custom ROM P780. So after googling, I tried Framaroot 1.91 to get ROOT access for apps.

I used ROM Manager to install CUSTOM ROM via sdcard(both phone and external card).
But I am unable to install ROM http://forum.xda-developers.com/lenovo-p780/development/slx-rom-lenovo-p780-t2722775 .
Whenever I try to install I get Installation Aborted message in recovery mode. I tried more than 6 times.

Can any guys help me to resolve this problem.

Thanks in Advance ...

MY PHONE INFO:
Android version:4.2.1
Model Number: Lenovo P780_ROW
Basebabd: P780, v23 2013/12/26 12.26
Build number: P780_8G_ROW_S124_140403