Need Help - Lost pages no one can purchase anything

I was trying to install Wishlists 05. I couldn't get it to work so I went to delete what I put in. Now when you go to my store bearlymakinit.com - everything seems to be fine until you click on an item. The pages that show up are blank? I downloaded a new zen cart and went thru it page by page in file zilla and can't figure out what page I could be missing so customers can shop. The only other thing that I was working on was the sidebox - Join Yahoo. I think everything was working then. The only thing I don't know how to delete is the sql that Wishlists had me install. Can that be why no one can shop? I am totally lost. Any help would be appreciated.

Debbie

I take it that you did not follow the cardinal rule when adding/changing anything - -
Backup files and the database FIRST....

Check these that they are standard files

template_default/template/tpl_product_info_display.php
your template/templates/tpl_product_info_display.php

Well yes and no. I backed it up, and then changed the entire thing around and I did Not Back it up again before I tried to install the wishlist. The template_default/template/tpl_product_info_display.php
was missing. I am going to back up right now again. Thank you for your help.