I know that.. I already have external as always.. I am not noob and it doesn't work at all.. I think even change from blus to bles might work but I will check it later. I doubt it will work either. I never have a problem. A few bles eboot versions works perfectly fine on my blus versions anyway.
You're terribly mistaken, it also works on Internal. It was confirmed a while ago and i can also confirm it. You have to use the BD Mirror option and it also needs a BR disk inside the drive though.
The only problem is that it was a lazy work from crapcom (what isn't these days?) and you have to exit the whole game if you want to play the other collection titles, which sometimes results in a random lockup. (Dunno if is a fix's issue) This doesn't happen with the MGS HD collection since you can always go back to the main game selector menu.