Dont thank me, I'm just the messenger. I have not tried it yet but seems to work for some. So if you lost root when you went to a leak, or if you want to upgrade to the latest leak and keep root here is what you need. Cheers!
[ROOT][HOW-TO]Working Root Method for ICS 4.0.4 - xda-developers
[ROOT][HOW-TO]Working Root Method for ICS 4.0.4 - xda-developers