Josh,
I got the code working with:
$("select[title='Columns']").parents("td.ms-formbody").append("<a onclick='javascript:AddColumn()'>Add New Columns(fields)</a>");
but not the spservices code. this is great progress! I really need the link to show up under a multi lookup picker. I got that to work using:
$("select[title='Columns possible values']").parents("td.ms-formbody").append("<a onclick='javascript:AddColumn()'>Add Columns</a>");
for the list box of possible vlaues. Does the above spservices function still need to come into play when using a multi lookup picker, i.e. is simple vs compound control still an issue?
Thanks again for your help the whole solution is working at this time. Thanks also to Russ for showing us the way.