I don't know if the nature of those instanced levels themselves would cause the riftgate function to not work properly as they aren't 'part of the map'. The only time I recall that one cannot use a riftgate is while inside of a skeleton key dungeon. It has been a few weeks since I last played, but I recall that anyone can already open their map at any time and click on a riftgate to travel to that location and a personal portal gets left behind at the old location. There is a mod out there, but it does not work right for me and it is limited. I'll make it worth your while if it can be pulled off. I'd like to make a request: Please make a cheat to use the riftgate anywhere.
