Here, this might help to, this will display it once they enter the server:
PHP Code:
public client_putinserver(id)
{
set_task(3.0, "welcome", id)
}
public welcome(id)
{
new name[32]
get_user_name(id, name, 31)
set_hudmessage(225, 0, 0, 0.05, 0.45, 0, 6.0, 6.0, 0.5, 0.5, -1)
show_hudmessage(0, "Use /car_crash to enter your vehicle.", name)
}