changing fonts from cm* in plain tex

[Antonio Rodriguez <arodriguez31@cfl.rr.com>]

Does anyone know of a url where it is explained simple and fast how to
use different fonts in tetex (for plain)? There are several docs in
http://localhost/doc/tetex-base/texmf/index.html, but none seems to be
fast enough for the little time I have to find out. I just tried
things like 
\font\myfont=pagk following
http://tug.org/fontname/html/Standard-PostScript-fonts.html
but it didn't work as I would expect.
Or may be someone can indicate? Thanks...