This .mp3 file can be converted to a .wav file using any of a number of audio editing programs.  I use Total Recorder but there are some freeware ones which will do it.  Open your editing software, open or import this .mp3 file, then export it as a Microsoft 16 bit PCM file--this converts the .mp3 file to a .wav file.  Once it is exported, open Windows Explorer and navigate to the exported file.  Right-click the file and choose to Rename it as your chosen menu music:  for example, to have it run as your beginning menu music in EAW, you would rename the exported file as MenuMus.bgm.  Click by the Windows warning that changing a file extension may render the system unstable. Still in Windows Explorer, navigate to your EAW\Music directory and rename your current MenuMus.bgm file to MenuMusOld.bgm or something of this nature in order to preserve it.  Copy the the renamed Piece of Cake file to your EAW\Music directory.  To use the file as music for another part of EAW, follow the naming conventions in the EAW\Music directory.  It should then run as your chosen event music.  
