Using external blacklists (e.g. SpamCop.net)

[phual]

I've recently started getting quite a bit of spam that has a very low score (around 2). There's no way that I can feasibly block this spam with internal rules, but using shared blacklists should significantly help. Problem is, I'm not convinced that I'm quite 'getting-it' when it comes to understanding their implementation.

Rather than struggling by myself, I thought I'd simple ask the questions.

Can the following be set up on a shared account:

dsn.rfc-ignorant.org
zen.spamhaus.org
dul.dnsbl.sorbs.net
bl.spamcop.net

If so, how?

Also, it is possible to install Mail::SpamAssassin::Plugin::SpamCop from Perl modules? On first glance it seems that I don't have the permissions (root only?), but I could simply be missing something.

All help apreciated.

Stuart