Mel,
the entry `xterm*charClass: 33:48,35-38:48,39:43,42-47:48,58-59:48,61:48,63-64:48,126:48` makes it easier to highlight-click urls in xterm although I may have a couple of digits incorrect as it does not seem to quite do it right .
xfontsel makes it easy to get the correct font syntax for configuration files, and immediatly gives an example
having 256colours in xterm is pretty handy too.
Jase