You will get the gryphon first with canned tunes. This is so you can get your hex code and get familiar with the gryphon.
Then some time will pass and you will get an email saying that your custom tunes are done. At that point you will need to download pegasus from php's main web support page. Follow the instructions and load your tunes.
There are some sticky's here in gryphon programmers that you should look at also covering this subject.