How can I manually restore a splitted file from independently created zip archives?

Backup4all creates standard zip files that can be opened with 3rd party zip programs.
However, when using the Create Independent Splits option and backing up a file big enough to be splitted into more than one zip file, you will need to perform an additional operation if you want to restore that file manually (without using Backup4all).
Steps in restoring a splitted file from independent zip archives:

• Unzip the archives that were created by Backup4all. Assuming that the initial file was called music.wav, if the file was split in 2 parts the problem is that both will have the same name, music.wav. Thus, when un-zipping the archive that contains the second part of the original music.wav, you'll get a message that a file with the same name already exist - you need to press Rename and name it music2.wav. Also, to make things easier, you need to rename the first part of the splitted file to music1.wav. The files you have renamed, music1.wav and music2.wav, need to be combined so that you have the entire original file, music.wav.
• Open the Windows command prompt (Start->Run, type cmd and press Enter). Using the command copy (write copy/? and press Enter to see the help for this function) write copy music1.wav /b + music2.wav /b music.wav (first two files are the sources, last file is the destination) and press Enter. Note that you have to be in the folder where the source files are in order for it to work.