I managed to finally get the weather working on my powerPc by downloading the latest version 1.01 update.
Then I looked up the default code for Amsterdam which is listed as NLXX0002
Opened up Safari, went to yahoo weather and typed in Amsterdam, it brought up a webpage with Amsterdam-727232, I went to view->view source and searched for the code " NLXX0002", it found it there, so I copied the line before that.
Went back into Yahoo weather, typed in Melfort, SK it loaded the weather, went to view page source in Safari and searched for the same line code, it pulled up CAXX0706
I can now view weather from places in CANADA!
Version 1.01 works well on the mac mini powerpc.