Great mod that still works even though the box doesn't seem too spawn correctly anymore.
(Too teleport the box somewhere accesible, open your savefile location and find "dynamitebox.xml", then open it with notepad and change posX too "-13.6883059" posY too "0.0541211441" and posZ too "33.690403". This should teleport it into the house driveway/the road leading down to the boat.)