I have two suggestions for other places you can look. Firstly try looking on the ActiveState website. This is clearly an active state version of perl and they are much more Windows oriented. Secondly I would try rereading all the documentation relating to PAR. I found quite a lot, tutorials, FAQs etc on CPAN. I scanned it quickly for information about registry but found nothing, but you might find links to other resources. There is also the possibility that someone who actually knows this module will read your post.