There are some additions to the includes file that I keep seeing on websites that I'm working on. One of these is the "How did you find us?" extra checkout parameter which is only designed to show you how you could use these parameters if you wanted to add fields. But as the example options given are just Google and Yahoo then there isn't much value on a real website and it just makes for an extra question on checkout. You will find this in your includes file as...
extracheckoutfield1="How did you hear about us?" extracheckoutfield1required=TRUE extracheckoutfield1html="<select name=""ectfield"" size=""1""><option value="""">Please Select...</option><option value=""Google"">Google</option><option value=""Yahoo"">Yahoo</option></select>"
$extracheckoutfield1="How did you hear about us?"; $extracheckoutfield1required=TRUE; $extracheckoutfield1html="<select name=\"ectfield\" size=\"1\"><option value=\"\">Please Select...</option><option value=\"Google\">Google</option><option value=\"Yahoo\">Yahoo</option></select>";
And these can be safely removed. Or modified / extended if you really want to ask this question. But it's probably not a good idea to just leave the default options of Google and Yahoo.