That is very good at explaining what you want to know, I won't lecture

my variables, do not have a package name, If I recall Correctly.

my variables are kinda magical. kiat asked about my variables a while ago. You should read it.
The right way, the way that will work anyway, is like so:

Foo.pl
-------
#!/usr/bin/perl
use Bar;
print $Bar::Baz;

Bar.pm
-------
package Bar;
our $Baz=42;
-------
[download]

In older version of perl5, instead of our you would do something like:

use vars qw($Bar);
$Bar=42;
[download]

You might also search this site for "Variable scope" or something like that.
Well, I hope that helps.