Customize a Wordpress plugin - WooCommerce Product Add-ons

I need a small modification to an existing Woocommerce plugin. I would like to be able to add an image to each 'add on' in the products. You can see a sample product here with custom fields created: [login to view URL]~rapidmx/product/flex-series-honda/ So I want the image to appear between the description and the field. So for example an image would appear between 'Select the font for your name and number' and the drop down box. The plugin used is: WooCommerce Product Add-ons Please describe your experience working with such plugins. Looking to complete today.