local buttons = {}

local function setpos()
    for k,v in pairs(player.GetAll()) do
        if v ~= LocalPlayer() then
            if not IsValid(buttons[v]) then
                local btn = vgui.Create("DButton")

                btn:SetText(v:Nick())
                btn:SetSize(30,30)

                buttons[v] = btn
            else
                local Pos = v:GetShootPos():ToScreen()
                buttons[v]:SetPos(Pos.x,Pos.y)
            end
        end
    end
end

hook.Add("Think","setpos",setpos)