Image attributes selector for Zen Cart

i am looking for customization to my zen cart website. i'm looking for a way to add image attributes to the main product image. I sell t-shirts an other items, customers can choose what print to add to the t-shirt. With zen cart, I can use Radio buttons to show the prints (attributes). But i have a lot of prints to choose from, making the page too long to view. I want a window to scroll containing the prints that customers can choose. list of required features: -adding or removing attributes easily. (same as any other attribute) -image to overlay in a fixed location on the product picture (transparent overlay) -It should load fast - What kind of image file to upload as attributes images When you bid, please message me with info on this project. I attached an image of what this project can look like. I am open to other ideas and suggestions to be able to offer many print designs to my customers. I would like to offer about 50 designs. My website link is [login to view URL] Link of another website to show how this could work, [login to view URL]