Even though you wouldn't stop bumping, I decided to make it anyway. Continue to bump your threads and I'll just lock them so you can't post anymore.
This plugin should be put in the plugins.ini where admin.amxx is.
Also, admin.amxx needs to be disabled!
Admin level required for the menu is the rcon flag.
This can be changed in the top of the plugin.
Only one admin can be in the menu at a time, so no admins can step on each other's toes.
If you delete yourself or edit your access to no longer have the required flag for the menu, then you will not be able to access the menu after that action.
Default cvars from admin.amxx still exist:
Default commands such as amx_addadmin and amx_reloadadmins no longer exist.
Command to access the menu is /manage, and can be access from normal and team chat.
Requires AMX Mod X 1.8.1 or higher.
Plugin is at this post: