Glad to see it worked.  Still kind of curious why it failed.  Perhaps the .py file was in the right place, but you ran it from a different directory?  Such as "python OfflineBundle/Install.py" (instead of cd'ing to the directory and running it there).  I wrote the install script assuming it was executing from the same directory the script is in.  Easy enough to modify the script to fix that though...

If you want a desktop icon, simply create /home//Desktop/armory.desktop: