there is a file called satellites.xml in your dm500
it resides at /var/etc
copy it to your pc and edit it with a unix type editor i.e. ultra edit
goto
http://www.lyngsat.com/america.html select the echostar you want to scan and manually add it to your satellites.xml file following the pattern already in use!
copy the file back and restart enigma; from then on you should find your echostar satellite in the scan menu
else goto
www.dbfn.tv and download the satellite.xml file you need from there
(that's for lamers)