[ltp] Success and follow-up (was Switching X screen res's "on the fly")

[Diego Zamboni]

> Because the XF86Config file is different for XFree86 3 and 4.  On 
> systems that support both 3 and 4, the config file for 4 is identified 
> by the -4 at the end.  Most systems that only use 4 eliminate the -4.

However, be aware that if XF86Config-4 exists, it will be used instead
of XF86Config. This bit me once when I was testing multiple
configurations, and saving them as XF86Config-1, -2, etc. You can
probably imagine the rest :-)

--Diego