Positioning of the "Payment" selector

The payment selector is added in hook_form_alter with a "weight" of -1. This seems to make the forms interface place the selector right up the top of the product page.

Our client wanted the payment selector repositioned below product attribute selection / option entry but still above the quantity field and "Add To Cart" button.

I have added the following field to the configuration menu in uc_downpayment.admin.inc, function uc_downpayment_admin

  $form['downpayment_select_weight'] = array(
    '#type'          => 'textfield',
    '#title'         => t('Weight of downpayment mode selector'),
    '#description'   => t('Controls the positioning of the downpayment mode select control on the product display.'),
    '#default_value' => variable_get('downpayment_select_weight', -1),
  );

and changed the line
'#weight' => -1,
in uc_downpayment_form_alter to
'#weight' =>variable_get('downpayment_select_weight', -1),

This allows the placement of the payment selector to be modified slightly, hopefully to the client's taste. -1 (the default) leaves it at the top of the product page, 0 puts it nicely between attributes & options and the quantity field, and 1 puts it below the Add button.