Hi
Now my Rift unit should arrive in 3 weeks and i have confirmed that there is a driver out there that is compatible with SH5.
It is called vorpX.
http://www.vorpx.com/ A custom commerecial driver that has hacked over 50 games to work with Oculus Rift.
When i asked the developer about silent hunter he said that it will work but without stereo3D effect. Which is not a huge loss because you still will get ton of immersion by having a picture wrapped around your head. Head tracking and rolling is also supported.
When i get my unit then SH5 will be amongst the first game that i will try out. If its any good i will let you know.
Personally i hope that this is it. The final nail in the iron coffin that would immerse me enough that i would feel being inside the submarine.
I will keep you posted and give my honest opinion.