I am also FOR AdminClasses overrides! Guys, I think you know jbx_menu as a module? I would be happy if you could merge it with blocktopmenu. Its based on blocktopmenu, and the latest version, 2.7 I think, does not work in Prestashop 1.5 becouse of the class AdminClassTab or something like that. Please merge it :-)! jbx_menu offers pictures for menu entries, you can change the colors, etc. trough the configuration dialouge, which does, like I said, not work under prestashop 1.5.
Waiting for reply.