This directory contains an example showing a very simple-minded
LaTeX interface to the \fontvariants primitive. If you replace
your teTeX 0.9 mktex{mf,tfm,pk} scripts with the variants in this
direcory and put {t1,}stretch.mf somewhere in your MFINPUTS path
and stretch.sty somewhere in your TEXINPUTS path, you can test font 
stretching with any LaTeX document by simply adding the line 

\usepackage[T1]{fontenc,stretch} \enablestretch

to the document preamble. You can turn font stretching off and on using
\disablestretch/\enablestretch anywhere in your document. 

stretch.sty adds 6 variants (0.97, 0.98, 0.99, 1.01, 1.02, 1.03) to
any font of the EC family. A reasonable interface would of course
allow more detailed selection of font variants.