Installing the Flash player 10 (beta) on an eeePC 900 with default Xandros

Updating the Flash player from version 9 to 10 should be easy but seems to be problematic on Xandros eeePC.
It is quite easy, in fact: this post on eeeuser.com explains how, but it is not completely exact for a 900 model.
For my model it worked this way:

1. open a terminal by pressing CTRL-ALT-T
2. type

   wget http://download.macromedia.com/pub/labs … 108.tar.gz 

   or download the file via a browser;
3. once the file is downloaded, type

   tar xvzf flashplayer10_install_linux_081108.tar.gz

4. close any open browser window;
5. type

   cd install_flash_player_10_linux

6. type

7. sudo ./flashplayer-installer

8. hit "Enter";
9. type

   /opt/firefox

   (instead of /usr/lib/iceweasel)
10. type "y"
11. type "n"
12. open a browser window, and check any flash website, such as YouTube.