Micha!

It's possible to remove stuff from map so maybe it is possible to add it

-------//--------------------remove map objects----------------------------
    for i = 64, 1021 do
        if et.gentity_get(i, "classname") == "misc_mg42" or et.gentity_get(i, "classname") == "team_CTF_redflag" or et.gentity_get(i, "classname") == "team_CTF_blueflag" then
            et.trap_UnlinkEntity( i )
        end

if et.gentity_get(i, "classname") == "trigger_ammo" or et.gentity_get(i, "classname") == "trigger_heal" then  --cabinets
                et.trap_UnlinkEntity( i )
            end
    end

No it wont work because of:

function et_ConsoleCommand(clientNum, command)

--Called when a command is entered on the server console should be et_ClientCommand( clientNum, command ) -> Called when a command is received from a client

 
    if et.trap_Argv(0) == "getmyguid" then

           local guid = et.Info_ValueForKey(et.trap_GetUserinfo(playerID),"sil_guid")

--playerID is nil -> not defined

    return 1  ---return 1 here...if  not have getmyguid comand will be 0..unreconize comand 

   end

end

fixed lua and I added !help myguid. You could also add a check level to just give it to some admins.

----------------------------------------------------------------------
-- Filename: myguid.lua
----------------------------------------------------------------------
-- MyGUID - Prints your silEnT GUID just like /cl_guid would for etkey based GUIDs.
----------------------------------------------------------------------
-- Created by =F|A=Chuckun
-- If you use it, please donate to our clan to help fund the servers
-- Any amount will help!!
-- Fearless-Assassins.com
----------------------------------------------------------------------
-- !myguid or /!myguid
----------------------------------------------------------------------

------------------------------------------ name ----------------------------------------------

Modname = "silEnT GUID Command"
Version = "1.0"

------------------------------------------ settings ----------------------------------------------

commandprefix              = "!"                --command prefix (! shrubbot like)
myguid_cmd               = "myguid"            --shrubbot command (can be shortened to example "myg"
                                            --just like !listplayers -> !list !listp !listplay
printposition              = "chat"            --message position

----------------------------------------- functions ---------------------------------------------

function et_InitGame(levelTime,randomSeed,restart)
   et.G_Print("["..Modname.."] Version: "..Version.." Loaded\n")
   et.RegisterModname(Modname.." "..Version.. " "..et.FindSelf())
end

---------------------------------- client command functions ------------------------------

function et_ClientCommand(client, command)
    local argv0 = string.lower(et.trap_Argv(0))    --first argv if you use / will be myguid_cmd
    local argv1 = string.lower(et.trap_Argv(1))    --et.trap_Argv(0) is say/say_buddy/say_team and et.trap_Argv(1) is myguid_cmd
    local argv2 = string.lower(et.trap_Argv(2))
                --string.lower so you ca write it in upper and/or lower letters
    -------//--------------------Command----------------------------
    if string.find(argv0, "^"..commandprefix.."" .. myguid_cmd .. "") or string.find(argv1, "^"..commandprefix.."" .. myguid_cmd .. "") then --use string.find so it's not needed to write full command.
        local userinfo = et.trap_GetUserinfo( client )
        local guid     = string.upper(et.Info_ValueForKey( userinfo, "sil_guid" ))
        if guid == nil or guid == "" then guid = "UNKNOWN" end    --in case client doesn't have no guid set it to UNKNOWN
        et.trap_SendServerCommand(client, ""..printposition.." \"^osilEnT GUID: ^7"..guid.."\"")
        if string.find(argv0, "^"..commandprefix.."" .. myguid_cmd .. "") then
            return 1    --return 1 so no error message will be printed^if /command is used
        end
    end
    if argv1 == ""..commandprefix.."help" and string.find(argv2, "^" .. myguid_cmd .. "") then -- !help myguid
        et.trap_SendServerCommand(client, ""..printposition.." \"^oFunction: ^7print your ^osilEnT GUID\"" )
    end
    
    return 0
end