First of all, your plugin's "Awesomeness" match threshold is really, really high :)
My question is that's possible to simply create some new related_WHATEVER functions to get related posts from any custom post type? Or need to modify the yarpp_related() function too?
Can I add some additional arguments or overwrite someones from the wp-admin page when manually put the code at any place my theme? That's just in order to create variable related post.
And what about the custom taxonomies? Is there any chance to use them in the matching algorythm without hacking the core source of your plugin?