FFWD and REW function

My first idea on how to use this player was to make wave files of all the parts of a song. So I would do the:
Keyboard, bas and drums Intro
Keyboard, bas and drums Verse
Keyboard, bas and drums Chorus

You get the idea. I wanted to put all these parts after each other and then play the song right true. But because it doesn’t go to the next song in the playlist without delay I can’t do this. If it would just go without delay to the next song segment then I can start the song from where ever and play it from there. So please solve this for me….