I think that's just going to be a nuisance. I have a similar problem, my game crashes randomly. Sometimes I can go an hour, sometimes 10 minutes before it crashes. I have to save very frequently, but it's not so annoying for me. If you are able to reload the game and get past the part where you crashed, then it shouldn't actually be preventing you from playing the game altogether.

I'm afraid I know of nothing that can fix this.