This tutorial is based on what I posted as an Answer for a Question at Mint Forums on 09 Jun 2011.

My own post on Linux Mint forums:

http://forums.linuxmint.com/viewtopic.php?f=90&t=74455

Ailurus is simple application installer and GNOME tweaker, which aims at making Linux easier to use.

Features:

# Ailurus does not work as it is on Mint 11 Katya.

# I will show you the workaround to make Ailurus work on Mint 11.

1. Open the Terminal (Applications > Accessories > Terminal).

2. Copy/Paste or type the following line of code into Terminal and then press enter:

gksudo gedit /usr/share/pyshared/ailurus/lib.py

3. System will then ask you for your password, type it and then press enter.

4. gedit will open a file called lib.py.

5. Open [ Find ] Dialog (Search > Find...).

6. Enter a string 'maverick' into [ Search for: ] Text box and then press enter ( or click on [ Find ] Button).

7. You will find two places like below.

@classmethod

def get_all_Ubuntu_versions(cls):

        return ['hardy', 'intrepid', 'jaunty', 'karmic', 'lucid', 'maverick']

elif MINT:

    DISTRIBUTION = 'ubuntu'

    UBUNTU_DERIV = True

    VERSION = Config.get_Mint_version() # VERSION is in ['5', '6', '7', '8', '9', '10']

    VERSION = ['hardy', 'intrepid', 'jaunty', 'karmic', 'lucid', 'maverick'][int(VERSION)-5]

    BACKEND = APT

    installation_command_backend = debian_installation_command

8. Insert a string , 'natty' behind 'maverick' (both of two), and insert a string , '11' behind '10', like this:

        return ['hardy', 'intrepid', 'jaunty', 'karmic', 'lucid', 'maverick', 'natty']

    VERSION = Config.get_Mint_version() # VERSION is in ['5', '6', '7', '8', '9', '10', '11']

    VERSION = ['hardy', 'intrepid', 'jaunty', 'karmic', 'lucid', 'maverick', 'natty'][int(VERSION)-5]

9. Save the file called lib.py, then close the window (both gedit and Terminal), Done!

# In my case, it was not necessary to Log out or Reboot.

Click on Ailurus Icon in mintMenu (Applications > System tools > Ailurus), Ailurus works!

Acknowledgement

I was able to write this tutorial by the grace of @Alexio.

If there had not been the exchange of comments between @Alexio and I on my idea "Improve 'Software Sources'", I would have not found this workaround for making Ailurus work on Katya.

I appreciate @Alexio though belately.

History of Modification

 - Corrected some words and phrases

 - Added 'a screenshot of Ailurus'

 - Added 'Acknowledgement'

(on 06 Aug 2011 11:40 AM UTC)