Talking [CHINA PHONE] - How to modify backup file of Android system <3e>.. Help me Plz..

Dear All..

My phone was brick when I modify a build.prop file.
That is a china phone, and I can't find any rom or data backup on internet.
The phone have Android system recovery <3e>. The system can't backup and create to ***.zip file type, it just create to ***.backup file type.
So I now have a userdata***.backup file ( include fail build.prop), and build.prop file ok.
Can anyone help me to modify the backup file by build.prop file ok..

This is my backup file:
mediafire.com/download/ac1ldbk5d6ary7v/backup.rar
I really looking forward to your help.
Thanks ..