[spacedhopper]

I would post your questions on another site, i don't know whether i can link to it from here, so search google for "xbox scene forum". You will find all the info there. Alternatively you could use one of the xlink tunneling services such as "xlink messenger" or "xbconnect" both of which allow you to play games off the harddrive.

EDIT: To the best of my knowledge, even if your harddrive is locked, you won't be able to play games off the hardrive on xbox live. Your best bet is xlink messenger, you can also play Halo online using that, which is a brucie bonus