Rather than trying to install everything, it's better to break your list down into manageable chunks. For example to install all modules beginning with "A":

#!/usr/bin/perl

use strict;
use warnings;
use CPAN;

print $_->install()
foreach CPAN::Shell->expand("Module", "/^A/");
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I usually break it down even further. For example, all modules starting with "Aa", "Ab", etc.

#!/usr/bin/perl

use strict;
use warnings;
use CPAN;

print $_->install()
    foreach CPAN::Shell->expand("Module", "/^Aa/");

print $_->install()
    foreach CPAN::Shell->expand("Module", "/^Ab/");
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And for an entire namespace, say Catalyst:

print $_->install()
    foreach CPAN::Shell->expand("Module", "/^Catalyst/");
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