Hacking Button remapping

[Cheezeys]

My "A" button is pretty unresponsive, looking into remapping it to "select". I found this: https://github.com/mikahjc/ButtonSwap3DS
but I haven't been able to get it working with no experience with ASM.


I think the code I need to switch the buttons using this program is something like this;
ldr r4, =0x1
ldr r5, =0x4
bl .button
ldr r4, =0x4
ldr r5, =0x1
bl .button

but I think the "r" values may be wrong, I don't know where to input it or even how to compile it then using devkit. I've almost given up, if anyone could make the cia for me, or help me make it I'd appreciate it!