Multiple Images Questions

[manifest]

I've read through the multitude of threads on the site to see if my question has already been answered. It seems that most people have difficulty understanding the naming conventions and file paths for multiple images. I believe that mine are set up correctly, but my product is still only displaying one image.

The site is at:www.bahamamontana.com/shop
The product is at: www.bahamamontana.com/shop/index.php?main_page=product_info&cPath=23_25_32&products_id=24

I uploaded the main image that is currently displaying through the admin when I created the new product. Using the admin I specified that the image should be placed in the directory titled 'indoor'. This should upload it to: images/indoor/indiancreek-bedroom.jpg.

I then uploaded (through FTP) the file "indiancreek-bedroom_MED.jpg" to the images/medium/indoor directory. When I view the product listing in my browser, and check the file path, this is the image that is displayed even though I originally uploaded to the images/indoor directory through the admin. I assume this automatically happens when you upload the same file name (with the _MED extension) to the proper directory.

From there also uploaded the following files to the images/large/indoor directory:
indiancreek-bedroom_LRG.jpg
indiancreeek-bedrom_02_LRG.jpg

From all the posts here on the site, I think that I'm uploading and naming correctly. However, from the product page you can see that only the main image displays.

I checked to make sure the setting for "Show Additional Images" was on in the "Product Types" admin config.

I'm not sure how to check if I'm using the add-on module "Image Handler".

Can anyone help???!

To summarize my images directory currently is as follows:
images/indoor/indiancreek-bedroom.jpg
images/indoor/indiancreek-bedroom_02.jpg (not sure if this file is even needed)
images/medium/indiancreek-bedroom_MED.jpg
images/large/indiancreek-bedroom_LRG.jpg (not sure if this file is even needed)
images/large/indiancreek-bedroom_02_LRG.jpg