I tried it. It was neat, but ultimately it was more suspenseful and atmospheric without it.
There is a lot more to it than just putting the music in… you also have to put the shots in the correct order and / or add the missing shots to get the proper cues. This applies to about 90% of the cut music and even some existing music already in the film…hence the reason it was cut or you have those dodgy fade down and back up again where the missing shots are. It is around 9 shots missing at a guess off the top of my head.
Basically just putting the music in is not how it was scored as it was re-edited after it was scored just before the production went bust and they ran out of money and time. Williams came back to rescore partially but some of this was not used. It got a bit messy I think at the end of production.