I gave it a go and tried to improve them as best as I could, and even setting up proper loop points. I was unable to do Dracula’s Castle, however, because it went over the channel limit. Below I have linked my attempt as .s files. I hope these prove useful to you. I will also link you to SME’s music interstation guide, if you really are struggling with music insertion and fixing.
https://feuniverse.us/t/music-insertion-guide-for-beginners/3791