Create a Slipstream package of my additional Help content for AX 2012 Help Server

I would like the create a Slipstream package of my additional Help content, for a customizes installation medium of the AX 2012 R3 Help Server.

According to the MS documentation this should be possible for Help content updates. Https://technet.microsoft.com/en-us/library/hh378076.aspx

But how do I create these packages from my Help content sides?

Thank you in advance for your help