IF both scripts are on the same server, you can do something like:

# upload.pl
use vars qw($data);

$data = "data to be shared";

require "/path/to/final.pl";
[download]

And then..

# final.pl
use vars qw($data);

print $data; # or do something more interesting.
[download]

The require statement will just load the "final.pl" script and run it. The $data variable will be shared between the files because it's a global variable.

This will NOT redirect your browser, so it might cause some problems, but it is much easier to share data this way.

Also note this assumes the $data variables are in the same package.

HTH,
Joost.