File list (Check if you may need any files):
opencart-1.5.6
..............\.gitignore
..............\install.txt
..............\license.txt
..............\upgrade.txt
..............\upload
..............\......\.htaccess.txt
..............\......\admin
..............\......\.....\config-dist.php
..............\......\.....\controller
..............\......\.....\..........\amazon
..............\......\.....\..........\......\listing.php
..............\......\.....\..........\......\product.php
..............\......\.....\..........\amazonus
..............\......\.....\..........\........\listing.php
..............\......\.....\..........\........\product.php
..............\......\.....\..........\catalog
..............\......\.....\..........\.......\attribute.php
..............\......\.....\..........\.......\attribute_group.php
..............\......\.....\..........\.......\category.php
..............\......\.....\..........\.......\download.php
..............\......\.....\..........\.......\filter.php
..............\......\.....\..........\.......\information.php
..............\......\.....\..........\.......\manufacturer.php
..............\......\.....\..........\.......\option.php
..............\......\.....\..........\.......\product.php
..............\......\.....\..........\.......\profile.php
..............\......\.....\..........\.......\review.php
..............\......\.....\..........\common
..............\......\.....\..........\......\filemanager.php
..............\......\.....\..........\......\footer.php
..............\......\.....\..........\......\forgotten.php
..............\......\.....\..........\......\header.php
..............\......\.....\..........\......\home.php
..............\......\.....\..........\......\login.php
..............\......\.....\..........\......\logout.php
..............\......\.....\..........\......\reset.php
..............\......\.....\..........\design
..............\......\.....\..........\......\banner.php
..............\......\.....\..........\......\custom_field.php
..............\......\.....\..........\......\layout.php
..............\......\.....\..........\ebay
..............\......\.....\..........\....\profile.php
..............\......\.....\..........\....\template.php
..............\......\.....\..........\error
..............\......\.....\..........\.....\not_found.php
..............\......\.....\..........\.....\permission.php
..............\......\.....\..........\extension
..............\......\.....\..........\.........\feed.php
..............\......\.....\..........\.........\manager.php
..............\......\.....\..........\.........\module.php
..............\......\.....\..........\.........\openbay.php
..............\......\.....\..........\.........\payment.php
..............\......\.....\..........\.........\shipping.php
..............\......\.....\..........\.........\total.php
..............\......\.....\..........\feed
..............\......\.....\..........\....\google_base.php
..............\......\.....\..........\....\google_sitemap.php
..............\......\.....\..........\localisation
..............\......\.....\..........\............\country.php
..............\......\.....\..........\............\currency.php
..............\......\.....\..........\............\geo_zone.php
..............\......\.....\..........\............\language.php
..............\......\.....\..........\............\length_class.php
..............\......\.....\..........\............\order_status.php
..............\......\.....\..........\............\return_action.php
..............\......\.....\..........\............\return_reason.php
..............\......\.....\..........\............\return_status.php
..............\......\.....\..........\............\stock_status.php
..............\......\.....\..........\............\tax_class.php
..............\......\.....\..........\............\tax_rate.php
..............\......\.....\..........\............\weight_class.php
..............\......\.....\..........\............\zone.php
..............\......\.....\..........\module
..............\......\.....\......