^Agreed. Hopefully this will be moved to the right place.
I'm trying to figure out how to use waterblocks as well. Basically, they're no fun... At least, that's the way it seems to be for me. With enough effort, you can acomplish what you're trying to do, but there are some very noticeable limitations. I'll tell you what I'm trying to do, and the solutions I've heard for it.
On my "Skies of Blockadia" map, I'm making some floating islands. I'd like to put lakes on some of them, but the water "bleeds" through the models. So, when you pass the water block, you end up floating, or swimming, or such, regardless of how far away you might be from it. There's the "removeWetEdge" option, or some such, but I haven't seen much success with that, one way or the other (perhaps I haven't fiddled with it enough). So, what I've done is set "density=0" and "viscosity=0" This means you can't swim in the water, since there's basically no surface tension whatsoever. If the "removeWetEdges" option works (not sure how to use it, since I don't see it working), then you might not need to change those settings. As I understand it, if that option does what it's supposed to (I can't tell if it's supposed to be checked, or unchecked), then it will limit how far the water's surface extends. So, when you're far enough away, the surface tension will no longer have an effect on you. If that holds up, then you can place waterblocks around your ship, and you would be able to walk below the water's surface. Of course, you have to space your Lego (TM) blocks and waterblocks very strategicaly for this to work. Meaning, you'll probably have to place more than one waterblock around your ship.
Another thing of importance is that the waterblocks are only scaleable in powers of 2. I'm pretty sure they can only be moved in powers of 2 as well. So, you might want to build a thick hull, since, most likely, some of the water isn't going to go where you want it to.
Hopefully, I've helped you out somehow. If not, please be ask a more specific question. Hopefully I'll be able to provide some help. One thing to note is that water (when you have the right textures applied) looks much better with "depthMask" checked. Anyway, good luck. Hopefully you'll get this figured out. Mouser X over and out.