which firmware do i use

[leedo55]

had no problems upgrading my lite on DG-16D2S drive for a while but ive just downloaded the new 1.61 firmware and
there 4 files in there

161-748
161-838
161-838v2
161-934-fix

which one do i use?
cheers

[CoFree]

you have to know what dvd drive you have in your console

161-748 is the 7400 dvd drive
161-838 is the 8300 dvd drive
161-838v2 is the 8300 v2 dvd drive 8300 after date june 09 (i think)
161-934-fix is the 9300 dvd drive