Robert, in fact I don't have music knowledge, what I did was somewhat cheating.
There is a nice Android app called xPiano, this app saves what you play in it as a txt file, then I made a "keyword" spreadsheet in excel to convert the xPiano notes to PBP's SOUND values this way I only have to figure out the durations...

Your mission Robert, should you decide to accept it is...
Figure out the note durations for the Super Mario Bros. melody, you can find my spreadsheet with the notes and the "keyword" list for xPiano in this link: http://dl.dropbox.com/u/29237304/xPiano-PIC.xls

Kind regards.

Ivan.