Best way to install MythTV?

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http://askubuntu.com – I've got a Windows Media Center pc at the moment, but I would like to change to Ubuntu ... if I can make it work. This related topic recommends that I use MythTV, and from that I have a new question: Given that I have a working Windows machine that I want to keep as a fall-back, would installing Wubi with the Mythbuntu choice be the simplest way to get a fully working Ubuntu-based media center? Note that this computer is not just for watching DVD's -- I want to watch live TV and schedule recordings from live TV. I receive ~40 analog channels and 4 digital (DVB-T) channels through the same an (HowTos)