i found this website which contains shenmue files which you can download, i think they are something to do with editing shenmue like LanDC is interested in, take a look for yourself, download them if u like (i havent).they look interesting, the site mentions 'Microphone file-This is needed to use the dreamcast microphone with shenmue' and 'Premade package-contains premade worlds,characters etc...!', they look like they could be pretty cool.
http://www.geocities.com/shenmuedownloads