you could split on colon space and then use map to ensure the order of your values matches the order of your keys... but, as Transient stated, your order is already ok

my %hash;
while ( <DATA> )
{
    chomp;
    my @ar = split /\: /,$_;
    $hash{$ar[0]} = $ar[1];

}
my @keys = keys %hash;
my @values = map { $hash{$_} } @keys; 


print join ",",@keys;
print "\n";
print join ",",@values;
print "\n";

__DATA__
Update Time: 2005.04.27 15:44:12
Targets: 4
Complete: 4(100%)
Waiting: 0
[download]

---

Waiting,Targets,Update Time,Complete
0,4,2005.04.27 15:44:12,4(100%)
[download]