Need Help!!

I am trying to edit LOTR rpg so i can play one player and use all the heroes (Aragorn, Frodo, Legolas, Gimli, etc.). When i try to edit nothing happens. I try to move some units but they wont move. How can you move them? When i save the map all these errors come out and all the dialogue and other thinkgs are erased. What should i do?

Please help. Only a biggenner.

0_o hmmm..... Maybe someone doesn't want people to edit their map. If you weren't a beginer, you could probably change stuff opening it in a different editor or extracting the files from the map.