Homebrew help with themehax

[azerti1304]

Hi.I need help. I wish to install themehax. Got a 03ds with a compatible firmware with browserhax but the screen of the top is thus broken I few not to see exactly the firmware of my 3 ds. But i can scan qr code. And I also have one 03ds in good condition 10.2. How I few to install themehax? And be that my theme ( lugia ) is going to disappear?

Thanks in advance. And sorry for my english.