tm6900 hd combo super +


hi all
just wondering if there is any guides on how to update/flash a tm6900hd super+, i bought one off e-bay but never got round to setting it up til now, i have a 1 meter motorised dish installed by a firm, so im ready to go. the problem i have is ive no info on what image or anything was flashed on the box. any help, channel lists ect..... cheers kezza