So I've been hacking Project M a lot, and I tried replacing Menu 1 with This Will Be The Day (just put the song into the folder and edited the info.pac and the mu_menumain.pac, like I do with my other songs). It worked fine until I got to the Stage Select, then the song played for a moment and then it stopped until I went back to my previous screen (CSS). And also sometimes when I either go back or select my stage, it like freezes for a sec and my controller vibrates and then goes back to normal.
https://www.dropbox.com/s/jrqmhbtakrj8rbp/T03.brstm here's a link it is by A Bloody Canadian. I have no clue what the problem is. Did I mess up or is it just not possible?