How can I add links to the main menu?
http://forum.coppermine-gallery.net/index.php?topic=12520.0
http://forum.coppermine-gallery.net/index.php?topic=13194.0
http://forum.coppermine-gallery.net/index.php?topic=10700.0
http://forum.coppermine-gallery.net/index.php?topic=12504.0
http://forum.coppermine-gallery.net/index.php?topic=9526.0
http://forum.coppermine-gallery.net/index.php?topic=8361.0
http://forum.coppermine-gallery.net/index.php?topic=6913.0
and dozens of other pages. In the future, please search before posting, this has been asked and answered very often already.
You shouldn't use cpg1.2.x, upgrading to the latest stable release (currently cpg1.3.2) is recommended.
Joachim