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If you want to install Win32::Setupsup, you’ll need to get it from a different PPM repository than the default one configured when you first installed ActiveState Perl. It can be found (as of this writing) in the very handy supplementary repository maintained by Randy Kobes at the University of Winnipeg. I’d recommend adding this repository even if you don’t plan to use Win32::Setupsup. The easiest way to do this is from the command line, like so:
$ ppm repo add uwinnipeg http://theoryx5.uwinnipeg.ca/ppms/
or, if using Perl 5.10:
$ ppm repo add uwinnipeg http://cpan.uwinnipeg.ca/PPMPackages/10xx/
You can also add it to the GUI version of PPM4 by choosing Preferences in the Edit menu and selecting the Repositories tab. More info about this repository can be found at http://theoryx5.uwinnipeg.ca/ppms/.