Replacing a Debian package with the original source package

[Rodolfo Medina <rodolfo.medina@gmail.com>]

Hi.

In my Debian system I have Mplayer that came with Debian and want to replace
with its svn version, recommended by Mplayer developers.

What shall I do in order to remove the old one?  Will an `apt-get purge' be
enough?  Or just remove the binary file?

Thanks for any help
Rodolfo