I did it for VS 2010.
1) Get NuGet updated.
2) Add a nuget.config file to the solution folder like this:
<?xml version="1.0" encoding="utf-8"?>
<settings>
<repositoryPath>..\..\..\Dependencies\packages</repositoryPath>
</settings>
3) Create an empty "packages" folder at the location referred by the nuget.config file.
4) Go to Tools -> Library Package Manager-> Manage Nuget Packages for Solution
5) Type "asynctargetingpack" on the search box (or any other package you prefer)
6) Install the package
7) Go to the "packages" folder at the location referred by the nuget.config file and check the package files are there.