Scaling 101

[Mark Davidson]

Where's a good place to learn the basics of scaling theory? 

I've looked at some of the Pscale examples  
(http://www.goptools.com/graphs.htm) and 
don't really understand quite what's going on. 
 I see the goal is to smooth out tension and 
"inharmonicity constant",   but what is 
inharmonicity constant, and can this smoothing 
be accomplished just by changing wire sizes 
or does it require changing string lengths also?

Also I have read that sometimes things that
look good in theory are not necessarily the
best sounding in terms of power, etc.

-Mark