BackTrack 5 on Ubuntu 12.04: how to add backtrack repository to Ubuntu 12.04

I want to have BackTrack 5 R3 on one of my Desktop computer but it already has Ubuntu 12.04 64bit in it and I like it that way.
BackTrack 5 basically is an Ubuntu distro with a kernel patch that will granted it’s user (a hacker) with packet injection for WiFi hacking but since I don’t need that kernel patch (I don’t have to hack into my home WiFi, do I?) I guess I can just add a BackTrack 5 repository onto the existing Ubuntu 12.04 64bit repository list and use the default Ubuntu kernel instead ;)

So here’s what I do

(1) Adding BackTrack 5 Repository to Ubuntu 12.04 64bit repository

rumy@cbug-nest:~$ sudo su
 root@cbug-nest:/home/rumy# cat >> /etc/apt/sources.list <<
 > deb http://all.repository.backtrack-linux.org revolution main microverse non-free testing
 > deb http://source.repository.backtrack-linux.org revolution main microverse non-free testing
 > deb http://64.repository.backtrack-linux.org revolution main microverse non-free testing
 > eof

(2) Add gpg key

rumy@cbug-nest:~$ wget -q http://all.repository.backtrack-linux.org/backtrack.gpg -O- | sudo apt-key add - 
 OK

(3) Update repository

rumy@cbug-nest:~$ sudo apt-get update

(4) Got this error when updating the 64 bit section

Fetched 13.2 MB in 8min 59s (24.6 kB/s) 
 W: Failed to fetch http://64.repository.backtrack-linux.org/dists/revolution/Release Unable to find expected entry 'main/binary-i386/Packages' in Release file (Wrong sources.list entry or malformed file)
E: Some index files failed to download. They have been ignored, or old ones used instead.
 rumy@cbug-nest:~$

(5) Download apt_0.7.25.3ubuntu9.13_amd64.deb  and downgrading apt to the one BackTrack have

rumy@cbug-nest:~$ sudo dpkg -i Programs/Linux/apt_0.7.25.3ubuntu9.13_amd64.deb 
 dpkg: warning: downgrading apt from 0.8.16~exp12ubuntu10.5 to 0.7.25.3ubuntu9.13.
 (Reading database ... 237850 files and directories currently installed.)
 Preparing to replace apt 0.8.16~exp12ubuntu10.5 (using .../apt_0.7.25.3ubuntu9.13_amd64.deb) ...
 Unpacking replacement apt ...
 Setting up apt (0.7.25.3ubuntu9.13) ...
 Installing new version of config file /etc/apt/apt.conf.d/01autoremove ...
 Installing new version of config file /etc/cron.daily/apt ...
 Processing triggers for man-db ...
 Processing triggers for libc-bin ...
 ldconfig deferred processing now taking place
 rumy@cbug-nest:~$

(6) Increase cache limit

rumy@cbug-nest:~$ sudo su
 root@cbug-nest:/home/rumy# echo APT::Cache-Limit "60000000"; >> /etc/apt/apt.conf.d/70debconf
 APT::Cache-Limit 60000000
 root@cbug-nest:/home/rumy#

(7) Update again and I have BackTrack on my Ubuntu 12.04 64bit