I would like to replace Pantheon Files with Nautilus in Freya 0.3.1. However, this doesn't work properly. After installing Nautilus it does not show in Slingshot. Nor can I add it to the dock because there is no symbol.
I then removed Pantheon Files because I thought both programs might be interfering. But to no avail.
It is possible to start Nautilus from Terminal. But then the following lines show up in Terminal:
Gtk-Message: Failed to load module "pantheon-filechooser-module"
I am using an old MacBook 13" Core2Duo, Early 2008. In other respects, Freya is working just fine.