I have been tinkering with Yamaha equipment most recently. The answer is no you cannot load those files. Trust me on this much...that keyboard you have, you should be glad it is a different format than the previous PSR types. Tally ho! Get back on that web and download some XG MIDI. They will sound great on that keyboard of your dad's if it is the one I am thinking of.
MORPH
My edit in addendum. I should clarify something. This is not saying PSR boards wont run or aren't XG, cause many are and do have the extentions set. Yamaha is a very thorough company and so you can be sure that there is a device (if not the last of the old upper line PSR types) that will load these files and save them as straight XG files as well as their previous proprietary standard.
[This message has been edited by Morphamatik (edited 11-17-2002).]