I just ripped my Blu-Ray version of Planet Earth to MP4's. Each Chapter was burned as a separate MP4 file. There are 10 Chapters in total, so I have 10 separate MP4 files. Each file is around 1.78GB at 3700kbps at 720p. What I want to do now is merge them together into one file. Then add custom chapters. Anyways, I have Quicktime Pro 7 and basically have been copying them all into one file, but once I try to copy the 7th file/chapter into the cumulative 6 previous files that are now in one continuos file, it doesn't really add anything. Is it not working because there is a limit on the file size of the file of an MP4? Any help would be greatly appreciated.