Just make new hash keys that reference the original keys' values:

use strict;
use warnings;

my %foo = (
  "GENERATE" => "10 14 00 07 4d",
  "DELIVER"  => "16 75 32 14 77"
);

$foo{CREATE} = \$foo{GENERATE};
$foo{DELIV} = \$foo{DELIVER};

use Data::Dumper;
print Dumper \%foo;
[download]

However, now you need to de-reference the values to use them:

print ${ $foo{CREATE} }, $/;
[download]

I recommend just duplicating the data:

$foo{CREATE} = $foo{GENERATE};
$foo{DELIV} = $foo{DELIVER};
[download]

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)