In 2003 there was celular phones that record videos in the 3GP Format; I downloaded them to my computer; they were played by a software named Platform4Player by Philips. But now they can be played with Windows Media Player (WMP).
What I want to do now is: to join/merge or concatenate those 3gp files.

I am using Windows XP.

How can I do such a merge?
Someone can help me?

Isabel