The file `boot.firm` is what is launched by boot9strap itself after it finishes loading off of NAND, and can be any valid arm9 payload in the FIRM format. This file can be replaced at any time, although Luma3DS allows for the launch of other arm9 payloads in the FIRM format using the Luma3DS chainloader.
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In this case, we use Luma3DS by [AuroraWright](https://github.com/AuroraWright/) to boot a patched SysNAND directly, allowing us to completely bypass the need for any kind of EmuNAND, vastly simplifying the usage of a hacked 3DS in addition to saving SD card space.
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During this process, we also setup programs such as the following:
+ **FBI** *(installs CIA formatted games and applications)*
+ **Themely** *(installs custom themes)*
+ **Luma3DS Updater** *(updates your CFW installation easily)*
+ **GodMode9** *(multipurpose tool which can do NAND and cartridge functions)*
1. If your device is on a version below 9.0.0, your device will not boot unless you use an alternative version of Luma3DS:
+ Download [a legacy version of Luma3DS]({{ base_path }}/luma_legacy/cf0b05e/boot.firm)
+ Copy `boot.firm` to the root of your SD card *(overwrite existing files)*
+ Replace this `boot.firm` with the one from [the latest release of Luma3DS](https://github.com/AuroraWright/Luma3DS/releases/latest) after updating your device later in these instructions
If, while following a previous version of this guide, you CTRTransfered your *New 3DS* to 2.1.0, now is the time to [restore your NAND backup](godmode9-usage#nand_restore) before doing this section.
{: .notice--danger}
If, before following this guide, you already had an EmuNAND setup and would like to move the contents of your previous EmuNAND to your new SysNAND CFW, now is the time to [follow Move EmuNAND](move-emunand) before doing this section.
1. If your device was on a version below 9.0.0 before updating, replace `boot.firm` on the root of your SD card with the one from [the latest release of Luma3DS](https://github.com/AuroraWright/Luma3DS/releases/latest)
1. If your device was on a version a version between 3.0.0 and 4.5.0 before updating, delete `native.firm` and `cetk` from the `/luma/` folder on your SD card
You can now hold (Start) on boot to launch the Luma3DS chainloader menu (note that the Luma3DS chainloader menu is only displayed if there is more than one payload detected).
You can now hold (Start) + (Select) + (X) on boot to dump the ARM11 bootrom (`boot11.bin`), the ARM9 bootrom (`boot9.bin`), and your console unique OTP (`OTP.bin`) to the `/boot9strap/` folder on your SD card (note that this will not have any kind of prompt or message).
You can now press (L) + (Down) + (Select) while the system is booted to open the Rosalina menu integrated into Luma3DS. For a full list of Rosalina features, please see the [Luma3DS v8.0 Release](https://github.com/AuroraWright/Luma3DS/releases/tag/v8.0)