Domains and Plesk

Hi guys,

Please excuse me but i am a total novice with WHMCS. Please can someone explain how i go about having the ability for a customer to place a order for a domain on my WHMCS installation and have it auto create this entry in plesk? is this possible? My supplier informs me i have to go through a registrar but i wanted to order directly from them

They do there own module but not quite sure how to implement it

Thanks.