Whats the best way to configure my system with 2 more versions of perl running?

The same exact way as 1 version of perl, install in the place of your choosing, like your home directory , with the defaults, like sh Configure -Dprefix=/home/username/perl -des

If that isn't "best" enough use perlall- build, test and do with all perls, its like better perlbrew with a lot of testing features, and builds and keeps sane global perl installation