Adding a UnityPackage to the default import list?

Hi everyone I am trying to find an answer to this problem which I am sure is trivial but I am unable to get working.

I am running Unity 5.1 on Windows 10 64bit if it makes any difference.

What I want to be able to do is when you navigate to Assets → Import Package instead of just seeing Custom Package I want to see a list of “pre-installed” packages that are of my own making. An example of this already would be installing UnityVS Tools where this option is always available once the package has been installed.

I currently have no such tools like this on the system and so I can’t find the base folder I assume Unity scans when populating the list is anyone able to help me out here?

I decided to download UnityVS Tools as the asset store items were not working, the correct location is actually:

C:\Program Files\Unity\Editor\Standard Assets

Based on: Where unity store saves the packages? - Unity Answers
Win 7: %AppData%\Unity\Asset Store\

Win XP: C:\Documents and Settings\Application Data\Unity\Asset Store\

Mac: ~/Library/Unity/Asset Store/

Those are where you can put the package and it will be there by defualt.