I found an old post of mine. I did not fully understand what that DIY was doing. It is comparing it to a ZERO POINT (default ride height). Assuming the default ride height of a 4.8 will be different from a 4.4, you can't use the same numbers but you should be able to use the same method.

Since we don't know what your zero point is I think you should just go straight to what I'm talking about in this link and set your zero point as you like. Six of one, half a dozen of the other - same result.

It should be in the Control Module Functions
http://www.xoutpost.com/756054-post55.html