I have a LTD 163D and GHR5 firmware. It only reads the first session on a multisession DVD+r. When I tried the GHR8 firmware it failed to even recognise the disc. The disc is clean with no errors when scanned, so I assume it is a firmware recognition problem. I searched and I see there is a Dell firmware for the LTD 163 but not the 163D. Any advice?? Can the 165/166 drives read all sessions on a multisession DVD+r??