Just under a month a go, InsideTwoWorlds member Youngneil1,released a mod, after a long time of trial and error testing and without the aid of an Software Development Kit but rather his and others knowledge, that merged both the Vanilla Two Worlds II & the Pirates Of The Flying fortress expansion along with the Adventure Multiplayer Maps all into one neat package. Making them all accessible within the same world!
Youngneil1's is constantly updating the Modification with fixes and improvements, so key and eye on the
Worldmerge thread, which has a handy FAQ and more details regarding!