Trouble with V.O

The voice overs that I recored didn't work very well and a lot of them wouldn't play so I have had to re-film the voice overs but they are now on my timeline and ready to be edited into place. I have put on section together which involves music being turned down for the voice to be heard and I am going to look inot how to make that a smoother transition so that it sounds right instead of messy which it is at the moment. I then need to cut the speach into the sections it is said in and edit it into the timeline to make sense. Once I have done this all I will need to do is add the titles to the sequence to make it look like the opening of a movie as it is intended to look.