I need help getting custom press to allow adding in images to a custom field

I need help. I am wanting to add several images to each directory post. I can do this by adding custom fields.. i know i've done it in the past with my own blogs.. the problem is my users won't know how to upload an image copy the url then paste it into the custom field input. Is there a way to attach the process to the custom press custom fields section of each listing? It would help so much if there was a way to do this.. since i'll be charging this seems like something that should be made available. Also why is there only paypal for the payment gateways on this plugin?