Sorry to break it to you, but its nearly impossible to do it unless you have a PC, because of the following reasons:
1. You need to study the forum
2. You need to study a lot in this forum
3. You need to study even more in the forum
Before you can safely flash your ROM.
I am really sorry for this, since most of the pple (atleast in India) don't have a PC. And honestly, I don't expect your friend to be generous enough to use your PC for hours.
Just a piece of advise, don't trust for so called 'Senior members', instead look at a thread in "Upgrading forum" by krazy and see who are the people who has actually helped in upgrading.
Thank You and sorry again.
I have ORD
Device 1: hTC One X+ in Service centre (too much flashing????)
Device 2: Samsung Galaxy S III (Stock)
Sony (India) SucksThey take handsets for repairing and don't bother to return for 9 months (WO Ref: #SE31247811057, 16.08.2012)
Search before you post. READ before you flash!
Don't post Thanks, click the Thanks button