Yeah, as long as you have your FTB server set up correctly. Just need to edit the server path in the MinecraftLandGenerator.conf so it goes to your worlds server. Make sure the name of your world is "world" and you should be fine. Also make sure that the "Run_MLG_Windows.cmd" adds the amount of land you want generated as well as -w and -a. The -w and -a make sure to ignore all the forge warnings.
Example:
Code:
java -jar MinecraftLandGenerator.jar 1000 1000 -w -a
It's a bit of a pain for single player, simply because it requires a server. But since most mods are universal, all you really need to do is add forge to the server jar and you're golden. Or use one of the server packs given by FTB. My world is a single player.
Also, you'll need to make sure your server jar is named "minecraft_server". So if you're using the FTB server pack, just rename it.
It took roughly 13 minutes to do a 1000x1000 for me. I have a laptop though, only 2GB ram. It really sucks...so it should go faster for everyone else. What makes it take so long is just the server start up, since it goes through all those warnings and notices and such.
Basically all this does is:
1. Start server
2. Generate Spawn
3. Save map
4. Stop server
5. Change spawn location
6. Repeat 1-5
Until everything is generated. Only, you know, automatically.