Make A DVD movie

I have a bunch of movies. They all have thier own audio. I want to put my own audio to them instead. The audio that I want to use is wav format. Are there any free programs that will let me do that, or are there any programs that you can pay for that will do it.

Thanks in advance.

It depends what format the movies are in.

If they’re in AVI format then VirtualDub (or VirtualDubMod) will enable you to disable the existing audio & import another audio stream in various formats.
When resaving the the file ensure that you do a Direct Stream copy other wise it’ll re-encode the video.