what always stopped me was that, i might be wrong, the requirement to create a module, describing the object in the separate file instead of just ability to make an object in the same file as the script.

You don't necessarily need separate files.  Separate packages, yes, but you can have more than one package in the same file (if you really want):

#!/usr/bin/perl

package Foo;

sub new {
    my $class = shift;
    return bless { @_ }, $class;
}

# ...

package Bar;

sub new {
    my $class = shift;
    return bless { @_ }, $class;
}

# ...

package main;  # the actual script

my $foo = Foo->new( myattr => "foo" ); # create an obj

use Data::Dumper;
print Dumper $foo;


__END__
$VAR1 = bless( {
                 'myattr' => 'foo'
               }, 'Foo' );
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