I need some help with The Legend of Zelda: Spirit Tracks.?

So I'm visiting Spirit Tower for the 4th time to get the railway map to the next temple. What Ineed help in is that there's these small eye things, that if they see you, they teleport the phantom of that floor to you, and it's a pain in the *** to get the other 2 tears of light, since the eye things are standing right in front of them, so, I was wondering if someone could tell me an easy way of getting the two last Tears of Light without being caught, that would be useful, and, I have an Action Replay, so if you could post a code for invisibility, or a code code for anything else that could help me, it would be appriciated.