You can either download the source code manually (see below), or get it using Zero Install. To compile using Zero Install bring up the version selection dialog box:
$ 0launch --gui http://rox.sourceforge.net/2005/interfaces/ROX-Filer
Right-click on ROX-Filer and choose Compile... from the menu:
It will prompt you to download the source and some required headers for GTK. For more details, see 0compile GUI.
Download these two archives (the links lead to a list of versions):
Extract the rox.tgz archive and run the ROX-Filer/AppRun script inside.
The filer will be compiled and then a filer window will open. Copy the ROX-Filer directory to either ~/Apps or /usr/local/apps (root password required).
$ tar xzf rox-2.7.1.tgz $ cd rox-2.7.1 $ ROX-Filer/AppRun