I would like to customize Ubuntu live CD by installing some additional packages. I have followed this link but it doesn't seems to work. Can anyone provide clear instructions?

Note: I do not prefer Remastersys, manual way will be appreciated.

Customization

Packages that I want to install:

• Thunderbird
• Samba
• SSH

Changes that I need:

• Remove Games menu from the Application menu
• Firefox shortcut on desktop
• Radiance as the default theme
• Different default Ubuntu wallpaper

Configuration file changes

• I want the panel to be placed at the bottom
• I want to paste my Samba configuration file instead of default Samba configuration
• I have few Firefox shortcuts and folders I would like to show that in Desktop
• Also it will be nice if you say me how to change the icon sets

Recent Updates

• I have customized Ubuntu 10.10 with Firefox shortcuts and few folders on desktops. Everything went smooth. But the installer gets crashes after choosing the timezone. How do i fix this issue?

• Also setting wallpaper affects the login screen. The wallpaper which i set is displayed on the login screen also. I just want the default one for the login screen.