featured image

Thanks for this plugin, it works great. One thing: when the plugin diplays the featured image it is the image included in the podcasts episod. Usually this is a larger image (at me is around 900×600 px) and the plugin just resizes and displays it. Is it possible instead to use a smaller size, a thumbnail of that image so that it doesnt slow down the webiste by loading a full size image and rezining it?

Thanks,
Florin