I've got something better than cave drawings

Ok, maybe some of you figured this too. I really like the movie, but one of the things I didnt like was the whole thing with the cave drawings. It reminded me of the pyramids from alien vs predator, and how they were all alike. Especially that line 'Found in different places all over the world, and yet' really sounds like something I have heard before more than once. It bugs me. But thats not the point of this thread anyway. I figured, taking the first alien movie and the novellization of that movie in mind, that the company had a clear objective when they sent Ash out with the nostromo crew in order to intercept the "distress call' or warning more like it. What if, in stead of coming up with this religious story behind Dr Shaw, which I didnt care much for, and all these cave drawings, the Prometheus had just set out for that same signal from the first movie? After all, the timeline on Project Prometheus proves Alien takes place after Prometheus. And maybe, in stead of a perfect landing on just the right planet, they would have crashed onto the wrong planet on their way there, namingly LV-226? That way its still on a different planet than LV-426, and the story would make a bit more sense. They could have come up with any given number of reasons for the ship to crash, maybe they could have made David crash the ship because he thought this other planet seemed more interesting to him? Who knows. It all sounds more interesting to me than the original prometheus plot. P.S. for you geeks out there. Maybe LV-426 is in a completely different direction than 226, I dont know this, but in that case they could have moved the location of 226 closer to 426.