Backup device before install new ROM

[hareldvd]

Hi there,
I own a nice inexpensive smartphone by Haier model w910.
I received it with ICS 4.0.4. I downloaded JB upgrade file Update.zip.
Before installing it I want to make sure I can retreat to original ROM. I failed to create a backup with either ROM Manager or Titanium backup.
I dont understand many terms such as Flash recovery and I dont understand the order of operations I should perform to make a full backup image and restore it, would the new version fail to install or operate.
I started from http://www.pandawillforum.com/showthread.php?21975-Haier-w910-Android-4-1-2-ROM

I guess I need a lot of help.
Thanks,
David Harel.

 

[hareldvd]

I forgot to mention that I rooted the device.

 

[jafferrafiq]

Need flash file for q Mobile noir a 600 plz help me