Thanks for the info man. I've search about this in google, and it seems that it's way out of my league.
However, I manage to use this tool (v0.8) even without kv.bin!!
The tool can load and edit just find without kv.bin. Doing the 'save & rehash' however, succeed only partially, i.e. only the save part (I think ). The rehash fails without kv.bin (it shows exception). However, with the 'quick fix' option from Horizon, I manage to rehash it, and voila, it loaded perfectly with all my edits intact.
Awesome!