When adding files, it's necessary to add an extra file, because the first doesn't get included in the combined file. For instance, I need to add files like so: mp3wrap.exe -v 01.mp3,02.mp3,03.mp3,etc. The first file, 01.mp3 won't get included in the final combined file. I'm always combining at least 10 files or more. I'm using Win32 ver 0.5 on Windows XP SP3.