Windows 7 sharing drives on virtual xp pc to media player

I have an annoying situation. I have a Zensonics Z500 media player which only easily finds files on the local network when connected to an xp machine. I now have windows 7 ultimate so the best i can do is get it to find the PC and files but the contents are not visible, [unless they are mpegs or wmv NOT AVI] anyway I have installed the virtual xp on the w7 pc. but not sure how to share them so that the media player can find them. I have tried right clicking on the drives in 'my computer' [xp] but sharing is not available. have i done something wrong?
Is it possible to see shared drives from outside the virtual xp machine from media players? thanks again for any advice

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.