Alright I compiled it and it works. I first tried the enum (0x020000) which didn't allow me to use the menu and got stuck on the clock.
I deleted the prx file from the original, changed VOLDOWN to HOLD and compiled it. I turned on my psp go now and it doesn't detect the hold button on the menus or in-game. Which is what I (and many others I found searching other threads) wanted.
Original creator of the disable voldown is codestation on github.
https://github.com/codestation
Thanks everyone involved for helping and putting up with someone who has no experience with coding outside of the very basics. I made this way too hard for myself (since the third message I posted had the solution) but at least learnt to use "cd" in command prompt. Thank you so much