The only reason to go to a new map would be if Red Power never updates like everybody is talking about (but it will, the author is just shy).
If that does happen or some other major mod disappears then it will be best not to try. Start over, give everybody a clean slate. There's a lot of funny metadata with some of these blocks that the map editors don't know what to do with anyway; they don't even always work right with the orientation of vanilla items.
