Ologoff, I myself had this same question once i found out about the issue in this forum.
Take a look in the tutorials sections and it will answer many of your questions.
I will save you the search for this one:
http://forum.replica-watch.info/vb/showthread.php/watchdudes-pam-cg-25369
I have not tried this for my two PAMs yet but plan on doing so this weekend. Please post pics of your results when you are done. Best of luck!
Take a brass punch and tap tap tappy.
Yes, file the pin flat. It should be a very easy mod provided you have a strap remover or a proper tool so you dont risk to scratch your CGs or case.