Names Over Players Head

[Tehepicford]

How would this be done?
I use .\\Shadow} Deathrun gamemode and have modifying it in the such:

Custom HUD
Custom Leaderboard
Custom Death/Player Models
Shop
Custom Sounds

I know how to do all that, but how do I make a rounded box over a players head that EVERYONE see's that says something like ADMIN.
Would a plugin do this or do I have to customize the gamemode?
If so how and what file do I edit?

-Thanks the Lua Noob-

[editline]5th September 2013[/editline]

Sorry - Double post.

[Vegasx]

This should draw text over players names, and hopefully allow you to get the gist of what's going on here.
[lua]
function DrawName( ply )

if !ply:Alive() then return end

local offset = Vector( 0, 0, 85 )
local ang = LocalPlayer():EyeAngles()
local pos = ply:GetPos() + offset + ang:Up()

ang:RotateAroundAxis( ang:Forward(), 90 )
ang:RotateAroundAxis( ang:Right(), 90 )

cam.Start3D2D( pos, Angle( 0, ang.y, 90 ), 0.25 )

draw.SimpleTextOutlined( ply:GetName(), "default", 0, 0, Color(255,255,255,255), TEXT_ALIGN_CENTER, TEXT_ALIGN_CENTER, 1, Color(0,0,0,255))

cam.End3D2D()

end

hook.Add( "PostPlayerDraw", "DrawName", DrawName )
[/lua]

[Tehepicford]

[QUOTE=vegasx;42093580]This should draw text over players names, and hopefully allow you to get the gist of what's going on here.
[lua]
function DrawName( ply )

if !ply:Alive() then return end

local offset = Vector( 0, 0, 85 )
local ang = LocalPlayer():EyeAngles()
local pos = ply:GetPos() + offset + ang:Up()

ang:RotateAroundAxis( ang:Forward(), 90 )
ang:RotateAroundAxis( ang:Right(), 90 )

cam.Start3D2D( pos, Angle( 0, ang.y, 90 ), 0.25 )

draw.SimpleTextOutlined( ply:GetName(), "default", 0, 0, Color(255,255,255,255), TEXT_ALIGN_CENTER, TEXT_ALIGN_CENTER, 1, Color(0,0,0,255))

cam.End3D2D()

end

hook.Add( "PostPlayerDraw", "DrawName", DrawName )
[/lua][/QUOTE]

Worked superbly, thanks.