I'm just piling on to say that I love this, even though I've never played Radical Dreamers.
Since RD is a completely different style of game than Chrono Trigger/Chrono Cross, it wouldn't apply for this project, but I've always been fascinated by the idea of recreating other RPGs' overworlds and interiors with Chrono Trigger's style. Part of me wonders there wouldn't be a tool that could be used to use the tile map from one of these other games and replace them with the corresponding tiles from Chrono Trigger as a rough, first pass, and from there the map would be adjusted so that it would not only be more accurate (in cases where the automated system introduces errors), but a more polished finished product.