additional pasckages for Octave

[antonio montagnani]

how do I install additional packages for Octave, i.e. the packages that 
are not available in repos.

 From Octave, installation seems disabled, I see the list of packages, 
but when I select one package, I see dowloading, installing lines, but 
eventually nothing is installed
-- 
Antonio Montagnani
Fedora 17 Beta
Acer 5670
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