[Q] Unable to install custom recovery on Rooted JB topic

There are already many questions posted on this subject but all the answers lead to the detail posts explaining ALL the procedure. I know the procedure to custom ROMs and I have done it multiple times on different phones.
I have successfully rooted my Sky Vega IM-760 but unable to install any custom recovery.
I have tried many methods but it gets stuck on every machine I ran it on. Please someone provide me precised help instead of complete tutorial. Sounds rough but I am fighting with it for two weeks still no luck.
Model number
IM-A760

Android version
4.1.2

Baseband version
M8660A-AABQNLYM-3.1.5030

Software version
S0211318

Kernel version[/SIZE][/SIZE]
3.4.0-perf
p11376@bs195#1
Tue Jan 21 17:47:43 KST 2014

Build number
JZO54K