iTunes Home Sharing across VPN

Naf

I have an iPad, iPhone 5 and Apple TV so obviously all of my media is in (or in the process of being converted for) my iTunes library. At home this all works wonderfully and I can access all my media instantly via Home Sharing. I had presumed that this would also be the case over a VPN connection, as all the devices would register on the same network, but it apparently doesn't.
I'm reasonably tech savvy (and on an electronic engineering degree), & a little research has thrown up two possible solutions. One of them needs more setup, but I'm pretty sure will work (http://provideotech.org/bonjour-and-vpn-or-how-i-learned-to-stop-googling-and-love-simplicity/); the other is nice and simple but I want to know if anyone knows if this method will actually help. http://hints.macworld.com/article.php?story=20080626194901370 I think that what the writer actually presumes is that you'd be dialling into the VPN from an actual computer running Windows/Mac OS, and you need to alter the hosts file on that computer, not one within the destination VPN network.

Anyone any ideas?