Okay so I added the images folder for the shopping_cart, and I edited the first php file (languages for the //cart_steps) - then when I went to the next step for editing my tpl_login default file, that didn't exist for my template. I triple checked. To remedy this I went in to the default template folder, copied the login default file from there, and pasted it into my template's folder. Before making any edits to that file though, I double-checked my login page, and it looks like this:
http://meljensdesigns.com/index.php?main_page=login
I think I made a mistake in copying the login default file over, because the two login boxes there (new customers and existing customers) used to be side-by-side. I checked this in Chrome and in IE and they both look the same. I even deleted the copied file from my template's folder and it didn't change it back. Not sure how to fix this. :-(
(Can you tell I am not that knowledgeable with coding? lol! I did my best to follow your steps so far, and I've installed other mods, not sure what I did wrong! Guessing copying that file was a BAD idea)