Having been paying around with Opencart lately, I now need to put a new template in to a site.
Being on version 1.5.4, it was very easy.
The template you want to use must be compatible with 1.5.4, or the version you are one now.
A template for 1.5.4 should have a structure like this
- Directory with the Name of Template
- Sub directory called images
- Sub directory called stylesheet
- Sub directory called template
In version 1.5.4, copy the directory with the name of the template in to /catalog -> View -> theme.
You should see a template in there called default.
Go in to the admin site of the site, System -> Edit your store -> Store -> Template
And change to the one you want to use.
Once installed, you will need to refresh your browser to see the changes. (ctrl-r)