I am working on setting up a Survival Games/Hunger Games-type server for a group of friends. I have created a spawn area in an otherwise empty map and would like to import a number of arenas into the map. Some are quite small and I can use MCEdit to export the area from it's own map and then import it into the main map. There are a number of arenas, however, that crash MCEdit when I try to import them as they are so large (i.e Varadie's Survival Games maps). The plugin I am wanting to use needs all arenas to be in the same map. I've also tried using WorldEdit to import schematics but that fails as well, probably due to the large selection area and the server running out of memory.
Are there any other map editors/mergers out there?