I don't want to uninstall my precious games, just put them out of easy reach for a while,
Pentium 4, 2.4 GHz 1.5GB RAM
Computers are my mid-life crisis - it could have been worse!
The OP want's to know how to change the Main Menu in Lubuntu 12.04. I don't see that question answered so I'll try to explain how to do it manually
without installing any extra packages that you may not need or want. In /etc/xdg/lubuntu/menus/lxde-applications.menu there is a section for each item
in the Main Menu so for example to remove Games from the menu, you look for
If you changeCode:<Menu> <Name>Games</Name> <Directory>lxde-game.directory</Directory> <Include> <Category>Game</Category> </Include> </Menu>
(note the s) or anything other than 'Game' the item will immediately drop off the Main Menu.Code:<Category>Games</Category>
To restore the item, change the Category back to 'Game' and the item will immediately re-appear.
The reason for this is, at least to me, obscure. The short answer is that in the directory
/usr/share/desktop-directories there is a file named lxde-game.directory. Everything between the - and the . in the filename is the category. i.e. 'game'
(The lxde- part is the vendor ID) Any file in /usr/share/applications that has the line Categories=Game; (note the capital G and semicolon) will show up as a submenu
to Games. To find them all go to that directory and type grep Game *
This may seem complicated, but remember the L in LXDE and Lubuntu stands for 'Lightweight' so it's not full of point and click stuff like Gnome and KDE.
The xdg website offers more explanations.
Hope this helps