I trying to convert a jQuery background image plugin into a web part so that editors can choose images, options, etc.

I need to pass an array of selected images to the plugin's initiation function. What would be a good way to do this? Can I do this with a transformation?

I know I can build the list of images with a transformation and put them in a <ul> list on the page, but, due to the size of the images, it would greatly affect the page load time. Instead, the plugin I'm using does a good job of loading optimization, so it would be ideal if I could just pass an array of user defined images to the plugin.