Being a bit of a fanatic I googled around for a long time and stumbled upon a couple of sites which told you how to do it: Try this link and scroll down.
http://www.stevehoffman.tv/forums/ar.../t-260501.html
There are three AFAIK available at present, Marquee, Manor House and Ram Jam. IMHO Ram Jam is the weakest of the the three currently available. The link above explains how to get the Marquee Tape which has Four Million Nobs which is worth any admission price on its own
After you follow the instructions you may get a message from Tom - I was worried it had not worked out but the correct reply to that message opened the door.