I have attempted to search for a topic like mine but to no avail. The PFPX templates only list the QW 757 in the Pratt Witney engine form and no Rolls Royce option. I am quite new to PFPX so I apologise for this, but is it something should worry about and if so, Is there a way to change this or create a template with RR engines option 

I love PFPX and Topcat as they greatly enhance the RW immersion of FSX. However aircraft configuration availability are the Achilles heel of both products. Quite simply there aren't nearly enough templates to satisfy the needs of the average customer who has a moderate size fleet in their FSX stable. The development company appears to be small and it is a rare occasion to see expanded aircraft compatibility with either product.