He will get the problem with any of the builds.
IIRC, if you kill off the looping PID it ought to go through eventually and then you can run:
/scripts/rpmup
If not, you need to either:
1. Install the CPAN module directly from source at cpan.org
or, better still:
2. Upgrade your perl version to v5.8.7 if you're not already on it using the tarball from
http://layer1.cpanel.net