Have a look at this i know its old bu av a lookI:I
http://forums.atvconnection.com//messageview.cfm?catid=25&threadid=423983&STARTPAGE=1&FTVAR_FORUMVIEWTMP=Linear
http://forums.atvconnection.com//messageview.cfm?catid=25&threadid=423983&STARTPAGE=1&FTVAR_FORUMVIEWTMP=Linear