If you want, I can instead:
Open or a similar Xbox 360 content manager on your PC. Inject the XeXMenu "CODE9999" folder into your USB drive. Install on Xbox 360 : Plug the USB into your JTAG/RGH console.
Installing XeXMenu is often the first step after modding a console. You can download the necessary files from community repositories like ConsoleMods Wiki or through tools like Steps for USB Installation: XeXMenu 1.1 vs. 1.2 - What's the Difference?
Many websites claiming to offer "Xexmenu 1.2 download" are filled with pop-up ads, malicious .exe files, or fake surveys. Never download a .exe file – Xexmenu is a .xex file (Xbox executable).