I'm an advanced user, is there a way to make scripts send directly to Prowl?
If you need to pass alerts where Growl isn't available, you might be better off using the Perl script than trying to forward it to a Growl machine.
The Perl script is prowl.pl. For more information on how to use it, run perl prowl.pl -help.
You may need to install Crypt::SSLeay, to do so on a Mac run sudo cpan and then install Crypt::SSLeay. For Linux or BSD, your distribution should have a package for it.
There are a few different versions of the script available:
prowl.py by Camron Flanders (Python)
pyprowl by Zachary Voase (Python)
rb-prowl by Matthew Schinckel (Ruby)
php-prowl by Leon Bayliss (PHP)