Well, I downloaded something to do it for me, but it's the same difference.
The file is
here. It increases the slope value you can place a lot at. Since I'm currently building up a custom island hood, I'm using a lot of flooded lots, so I finally broke down and grabbed the one with the value of 50. (I don't have BV or FT, so I don't know how beach lots change these things, plus I can't modify my terrain.) Before, it took very specific circumstances for me to plunk down a sloped lot to flood it, but now I can pretty much do it up and down the coastline--I just can't put anything down close to something I've already built. I'm going for things that look like
this up and down the coastline of the hood, with most of the normal community lots further inland on flat land.
Obviously, if you place things willy-nilly with the change in values, stuff will get even more deformed than it usually can. Though I suppose it makes it a little easier to fix the deformation with the ol' placing more flat lots trick.
This one looks interesting, too...though I'm trying to make lots that are still playable, so I haven't needed anything that extreme.