Installation prefix to use for add-on modules and utilities? (~name ok) [/opt/perl-5.8.8]

What modules/utils are being referred to here? I don't think it's for site_perl stuff, because that gets mentioned in the subsequent configuration question.

This is the question for the siteprefix config variable. It's usually a directory that contains bin and lib subdirectories. The answer you give here can provide the prefix of the default value for several other config variables: sitescript, sitebin, sitelib, siteman1dir, siteman3dir.