Modifying/Shrinking .SBNK files/Diddy Kong Racing DS Music Restoration

Today I have been checking around the DKR DS files, and I can find SSEQ and SBNK which are used for music. The SSEQ are the music sequences (Think MIDI) and the SBNK apparently is what points the instruments used for the song (or something like that, or just think Soundfont). I also have found that you can't replace a SBNK file with a bigger one than the original used, or else it will just stay in whatever place said SBNK was intended to be used.

Now well, I just thought in the idea of...

Modifying/Shrinking .SBNK files/Diddy Kong Racing DS Music Restoration