Problem SOLVED!
For those struggling with the same issue ... this is what I've done.
1. Created a custom field (or more) in virtuemart back-end, and gave it a Layout Position of
on top2. Then I added the following code to the php file ... joomla/templates/...your template.../html/com_virtuemart/productdetails/default.php
Quote<div class="productDetails">
<?php if (!empty($this->product->customfieldsSorted['ontop'])) {
$this->position='ontop';
$custom_title = null ;
foreach ($this->product->customfieldsSorted['ontop'] as $field){
?><div style="display:inline-block;" class="product-field product-field-type-<?php echo $field->field_type ?>">
<?php if ($field->custom_title != $custom_title) { ?>
<span class="product-fields-title" ><b><?php echo JText::_($field->custom_title); ?></b></span>
<!-- <?php echo JHTML::tooltip($field->custom_tip, JText::_($field->custom_title), 'tooltip.png');
} ?> -->
<br>
<span class="product-field-display"><?php echo $field->display ?></span>
<span class="product-field-desc"><?php echo jText::_($field->custom_field_desc) ?></span>
</div>
<?php
$custom_title = $field->custom_title;
} ?>
</div>
3. It will give you a layout on the frond end that looks like this:
Heading: Description
4. If you would like a custom tip to display just remove from the code (line 9 and 10) <!-- -->