Adobe Flash Player Firefox plugin-in for Ubuntu 6.10

I tried Adobe Flash Player Firefox plugin-in for my Ubuntu 6.10. Here are the steps I did.
1] Download Adobe Flash Player (the .tar.gz package) from http://www.adobe.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash&P2_Platform=Linux&P3_Browser_Version=Netscape4
into /usr/src

2] Then extract it
tar -xzf install_flash_player_9_linux.tar.gz

3] cd /usr/src/install_flash_player_9_linux/

4] sudo ./flashplayer-installer

5] When prompted for the installation directory, enter /usr/lib/firefox

6] Test your installation by playing some videos from http://blip.tv

Reference:
http://ubuntuforums.org/showthread.php?p=2698035