Prerequistes:

1) Install DotShoppingCart OpenSource Edition

Install DotShoppingCart Addon:

1) Unzip files to the local directory and copy all files (including sub directories) from Web directory to DotShoppingCart Web directory.

2) Configure Checkout Page to use OnePageCheckout & Anonymous Checkout

3) If you are running on the live site, go to page <your site url>/Admin/Site/License.aspx and install the license key.