just use a brick near the spawn, or when they spawn, which lists them
what you could do is
onplayertouch>client>vce_ifvariable[spawned][==][1][target of the lines below this one]
onvariabletrue>client>vce_modvariable[spawned][set][1]
onvariabletrue>client>chatmessage[tips here, do as many lines as needed]