I was disappointed when the only thing I found of this OST was an ok quality .vgm rip with whack tempos. This led me to rip the music myself with the proper tempos and in the ever so convenient mp3 format, so here you are:

http://rapidshare.de/files/48906977/McDonald_s_Treasure_Land_Adventure.rar.html

Don't be fooled by its name; this game is amazing and has excellent music.

He speaks the truth. Good rip, man.