I'd have to read again, but i thought the readme said any version of 1.2 thru 1.4 would work. not the original. but it sure does work on v1.4. I have also tried snapshot 1.5.1 which is OK but the speeds for me are 100% to fast. Flank is 50kts.
and slow is 10 to 11 kts.
. also it takes 3 to 4 torps to sink a T3 Tanker.
so I'm back to looking for a different mod, or I might try to redo this one .
slow it down some!