Don't know how to start ede.

[mzilikazi]

I've apt-got ede,

Unless you added a source that has Equinox Desktop Environment debs I'm afraid you didn't install a new wm but rather an emacs tool.

ede
File manager / Makefile generator for Emacsen
EDE is a project management system. It implements projects under
Emacsen making it easy to maintain programs without learning
make.

EDE is now a part of CEDET (Collection of Emacs Development
Environment Tools).

You'll have to build Equinox Desktop Environment from source (the site has instructions). If you DO have a source post it please.