[22:13] <NikTh> I want to thank all of you guys your time and effort to solve a newbie's problems (mine). Fortunately I achieved my goal to upload a custom-kernel in a PPA of mine and it is a separate version (it not replace the official Ubuntu kernel). 
[22:14] <NikTh> https://launchpad.net/~nick-athens30/+archive/precise-optimized if you want to test. For the record, the secret here is the ABI . If you completely change this, then apt will recognize this kernel as a separate package. linux-image-3.2.0-440-generic :) 
[22:27] <ohsix> that's becasue it is, the ABI number is there for a reason :p