Today Kirben committed a fix for Personal Nightmare PC. This works by patching the compressed 72.out file.
Support was dropped for the uncompressed version, since it should never be needed.
Interestingly enough a couple of the sprites still seem a little weird, namely the kitchen(bottles) and the lounge(fruit bowl).
But this is how the game was released.
It was fun to play around with this game but thankfully I dont need to any longer :D
Many thanks to Alan Bridgman and Kirben for 'fixing' personal nightmare for the masses :D