http://wiki.mudlet.org/w/IRE_mapping_scripthttps://www.youtube.com/watch?v=RG1-IqbdBpQ&list=PLVmfkk5cO-Tfv8cgpJrGiFEz_EhFQuFc7&index=5And https://www.youtube.com/watch?v=DYU8MmBrtuEThere are of course plenty more.