Now that Episerver has pushed everything to using Nuget, installing Episerver commerce is extremely easy. First you need to install the Episerver Visual Studio project extension.
This extension will ceate you a brand new Episerver web project with all the required Nuget packages pre-installed for you. You need to download Visual Studio extension. You can create empty or template projects and do custom development on it.
After that you can create your Visual Studio MVC project
Next, you need to make sure you have the NuGet Package Manager installed with the Episerver feed installed in the source manager, “http://nuget.episerver.com/feed/packages.svc/”. first open up the Nuget settings page:
And Add the EPi Feed.
To install commerce, right click on your solution and select Manage Nuget Packages for solution, you should see an Episerver feed in the right. Select it and search for commerce.
Install the feed, build your project and you’re done
For more information have a look on Epi World http://world.episerver.com/documentation/Items/Installation-Instructions/installing-episerver/