How do I use small vs large Images?

I previously setup some products with attributes, added images for each attribute and they show nice an neat, not too large on the product page (http://livingtowers.com/coopstore/index.php?main_page=product_info&cPath=11&products_id=73). When I look at the attribute the image name is ap_01_sml.jpg. I am adding another product and I want to do the same thing but the image is large. I cannot remember how I set it up to put the suffix on the filename and make the file smaller. I do have Image Handler 4 installed but that doesn't say anything about a sml suffix.

Does anyone know how I may have set this up? I don't think I resized each of the files, besides, they are not even on the server in the path specified in attributes manager.

With IH4 you do not need to worry about SML MED LRG... IH4 creates cached thumbs of the MAIN image - so just load up ONE large image to the images folder.

You can get rid of _MED and _LRG images.

Yeah, that's what I read last night when I was re reading upon the mod. I just don't know where it is getting the _sml.jpgs from as they do not exist in the folders on the server. Do you see what I mean though? On the page above the images show a nice size and do not take up the whole screen like they do when I am adding images on another product with attributes. It was a month or so ago and I don't remember what/how I did it. :(