Things we are gonna need are
Blender 2.7x http://www.blender.org/XPS tools addon for Blender (Blender 2.7x XPS Tools 1.1 made by yours truly )A Model for XPS/XNALara (Binary or ASCII)
For Mac Users
Safari automatically unzips downloaded files and deletes the original ZIP file.
Try disabling this function (I don't know how, I never used a Mac) or download using another browser like Firefox.
UPDATE: Here is avideo showing the install process. Thanks a lot!
Install Xps addon to blender
First thing we have to do is to installing the addon.
Go to the provided link and download the latest version of the addon. DO NOT UNZIP IT.
Open Blender and go to File > User Preferences
Select the Addons tab and c