[Tutorial/Guide] Using multiple A9LH Payloads without R/L buttons (Setting up BootCTR9 Boot Manager)

So you've come to this thread because you either want to use BootCTR9 (a boot manager), or you have a broken L/R Button (this also works if you have other broken buttons, because you can configure this with BootCTR). This guide is written based on that you already have a9lh set up with aureinand

So first, get your payloads, Like UnCart.Bin, Decrypt9WIP.bin and the AuReiNand arm9loaderhax.bin file
I will upload a zip file containing everything if you are lazy and just want it to work, and do...

[Tutorial/Guide] Using multiple A9LH Payloads without R/L buttons (Setting up BootCTR9 Boot Manager)