Well in the main source folders there is a "map" folder which has the jms converted for you, you can edit them put them into the maps within Wserver and make the the load world load jm and not wmap. Don't forget to embedded resource the map, here's a tutorial if you don't know how to add a map: (Credits to BurgerLoverMx)
https://www.mpgh.net/forum/showthread.php?t=1109293