your question was a little confusing in the way it was worded.
to add those recordset columns to the email, the code:
<?php echo($RecipArray[$RecipIndex][0]["[yourColumnName]"]); ?>
should be:
UserID: <?php echo($RecipArray[$RecipIndex][0]["UserID"]); ?>
UserFirstName: <?php echo($RecipArray[$RecipIndex][0]["UserFirstName"]); ?>
UserLastName: <?php echo($RecipArray[$RecipIndex][0]["UserLastName"]); ?>