Comment 8 for bug 1009412

Bhavani, I'm not the definitive guide, but what Vibhav provided was good enough for me.

Vibhav, for your future reference, I think that Bhavani was meaning that you can start the merge by doing:
  grab-merge zerofree

and working from there (see doc at https://wiki.ubuntu.com/UbuntuDevelopment/Merging)