(setq package-archives '(("ELPA" . "http://tromey.com/elpa/") ("gnu" . "http://elpa.gnu.org/packages/") ("SC" . "http://joseito.republika.pl/sunrise-commander/")))and do:
M-x package-list-packages [RET]in Emacs. You need a fairly recent version of Emacs with support for multiple ELPA repositories for this to work correctly. If you're using Emacs 23 or older you may do this instead:
Unfortunately the version of package.el you obtain by following the procedure described at http://tromey.com/elpa/install.html is older than the one distributed with the latest Emacs sources, and it does not allow to use more than one repository at a time (by default the one at http://tromey.com/elpa/). It doesn't even define the
package-archives variable. What you can do instead is the following:
(setq package-archive-base "http://joseito.republika.pl/sunrise-commander/")and press Return,
M-x package-list-packages, as usual — you should see now the contents of the Sunrise Commander ELPA repository,
(setq package-archive-base "http://tromey.com/elpa/")and press Return to restore the variable to its original value.
Or you can simply download Sunrise and any extensions you want to use and install them manually with