Aces did a mod a while back...its called "Aces' Super Turms v6 Damo's Type 7 Atmospheric Interior lighting add-on v2"
it goes along with FM interiors, looks really nice, it contains
NSS_Uboat7_CR.dat
NSS_Uboat7_CT.dat
NSS_Uboat7_RR.dat
Its a bit complicated, and aces has alot files at plisskens server, but it gets you damos light changes...
if you cant find it and are interested i will put a link to just those modified files up for you
brett