You might want to google around for Adobe PDF forms technology and FDF data merging tools... there are a number of programs for autofilling-in forms that might suit your needs.
An example of what I'm saying (dunno the program, it just seems promising) is here: PDFtoolkit
HTH,
 Ant9000
UPDATE
I've been looking for a Perl solution on CPAN: seems the best way to go is the module PDF::Reuse, which, among quite a few other things, does enable you to programmatically fill in forms in pdf files.
And yes, it's as simple as this:

   use PDF::Reuse;
   prDocDir('doc');
   prFile('Ex17.pdf');
   prField('First_Name', 'Lars');
   prField('Surname', 'Lundberg');
   prField('City', 'Stockholm');
   prField('Country', 'Sweden');
   prDocForm('doc/Ex16.pdf');
   prEnd();
[download]

where doc/Ex16.pdf is the original pdf with the form (code copied from the online tutorial).
If it works as advertised, that's a great tool!