im having the same problem with insolence. im using v1 and the coordinate button is not there. i have tried to do this with entity but am getting a missing map error although i have the maps in the same folder as the one im modding which doesnt make sence... can someone please post a link to the plugin needed or give more insight on this topic because there are a lot of people confused.
This is the error that comes up in entity. 
This is the folder i have my map in. as u can see it contains all the necessary .map files
Never mind, i got a different entity, the one the guy said to get, the beta. and it worked fine. i got no error and i got the values changed. thanks! still someone should find a plugin to show the coordinates button on insolence.