PLS help udpate nec ND6650a in lacie enclosure

hi guys,

my first post here as i desperately need your help! i have an lacie slim dvd ext (with nec nd6650a inside) which refuses to write multisessions (expect on re-writables traxdata) on any branded dvds (sony, tdk, verbatim).

i want to update it but how could i do it as long as it is in an eclosure? cant take it out cause will void the 2 yrs warranty.

it has as firmare 1.23 and i know its a 2.23 and 2 dells.

so PLEASE i reaaly need to write multisessions, so a firmware update would be my only chance!