Weird, i did it exactly like that, using the icons IDs and for some reason it still showed up BF and FD, i will try again, but i'm sure i did it like that, pretty easy, thats exactly why i thought it was a code bug or something like that, anyway i'm trying again and i will post results and the code.
About the Hyrule thing, i'm pretty sure is not that, first of all that stage is replaced with WWR, but it loads the BF music selection, and PW already sayed it would always show up that music selection, so it's the code right now, at least he thinks so. But i'm talking about loading that stage using the SSS expansion code with the Custom SSS, that's the reason why it loads that music. Making a Eldin or Temple version of that stage would work if loaded with Alternate File Loader or File Patch or both, but it will still show up BF music when using SSS codes sadly T_T.
And about making a different stage version, porting it to Eldin would be great, i never use that stage so it would be nice to have it there
. f you do it i would be really thankful, but if you don't mind, i'm kindf of shy to ask you to do that :S, wouldn't that be a problem or something? If not, it would be really cool
Very kind of your part too ^^