I would guess you should be able to assign to it in the following way:
push @$results, {first=>'Paul', last=>'Armin'};
Jasper
http://www.bookings.org
Code:
$results->[4]{last} = 'Cramwinckel'; push @$results, {first=>'Paul', last=>'Armin'};
Jasper
http://www.bookings.org