Linux – How do I replace the Ubuntu logo and branding in a custom distribution?

I’m trying to create an ubuntu-based distro in KDE wondering if there is any way to replace kubuntu and ubuntu logos or brand marks?

For example, KDE has the KUBUNTU logo in the boot menu, how can I replace all similar logos?

All logos are located in the Ubuntu distribution.
Works on ubuntu and kubuntu 12.04.03

Ok, after searching the Linux file system, I found very few files (logos) that can be replaced to prevent copyright infringement.

All files are there

      /usr/share/icons &
      /usr/share/pixmaps

The file name to be replaced is (all files are in PNG or SVG file format).

   start-here 
   distributor-logo
   ubuntu-logo 

I’ll add more names if I can find it later.
still
Edit these files according to your requirements
/etc/issues.net
/etc/lsb-release
/etc/issue

But you must edit /usr/share/pyshared/aptsources/distro.py

And assign the value of the original lsb-release file to a variable like this

       self.id="Ubuntu"
       self.codename="precise"
       self.description="Ubuntu 12.04.02 LTS"
       self.release= 12.04

Thank you.