Editing keynote recordings

Hello. I'm working with keynote and have recorded a presentation. As you can't (or at least I can't see how to) edit the recording on Keynote I looked up how to extract it, which I've managed to do. The problem is that the folder containing the data does have the sound files but they are all broken up and i can't see how that will help me at all. I need to edit the file as there are a few mistakes and too long gaps in between slides etc. The only other way I can think of doing it is to re record the whole thing everytime i make a mistake.

Does anyone have any ideas what I could do?

We are working on various mac products, a mac book air, a mac pro and more. I've just given the mac book air here