The Package Manager Console is an instance of PowerShell in a tool window.
You can get your full PowerShell environment by manually running your startup script:
> cd $env:Home\Documents\WindowsPowerShell # you may need to use $env:USERPROFILE
> . Microsoft.PowerShell_profile.ps1
(Of course, use the name of your startup script…)
(I suspect this would work in VS2012, but I haven’t tried it.)
UPDATE: To load your startup script automatically, you need to find the script that the Package Manager Console first loads. I found a file named “Profile.ps1” in “C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\Extensions\t15jiici.0ox\Modules\NuGet”.
In Profile.ps1, I added: