ever want to have units smoothly go over water? i found a way to make ground units to seem like boats, its a little buggy but anyone whos actually interested in using it is free to post a request about it ill be glad to show you how and the bugs, ill be posting a screenshot or two soon, im sure its no big thing but the units can move smoothly in a straight line in any direction, can be used for cutscene, or alot of other various things, i was going to use this in a map im working on atm but i didnt find room for it, anyway.
Maybe you can try moving a unit from null to water, then make a location move to that unit. Make that unit at the location move to a location on a doodad or water so it stops moving. Then you can probably order it to move around. I havent tested it but maybe you can.