blackbox menus are easy to edit manually with your favorite text editor, i dont know where exactly where your blackbox menu is installed, (depends on who built it) but usually it is in /usr/share/blackbox
they usually go as follows:
[exec] (Firefox) {firefox}
and submenus are arranged like this:
Code:
[submenu] (Graphics)
[exec] (gimp) {gimp}
[exec] (GQView) {gqview}
[exec] (Scanner) {xsane}
[end]
and sometimes submeus will have another submenu within it:
Code:
[submenu] (nameofsubmenu)
[exec] (someapp) {someapp}
[exec] (anotherapp) {anotherapp}
[submenu] (nameofsubmenu)
[exec] (moreapps) {moreapps}
[exec] (evenmoreapps) {evenmoreapps}
[end]
[end]