Executing the exploit twice will end in freezing 3DS, but crashed as it would do in sysNAND.
I suggest testing this with sysNAND only to thoose with Hardware Mod (Backup first before installing!).
To install cia into sysNAND, you need devmenu without emuNAND inside SD Card.
Spoofing is easy. 3DNUS > 0004003000009D02 > Version you want to DL (i took 4096) > Spoof to highest possible Version (option in 3DNUS).
The file was changed, i did a quick md5 compare to all files.
I could go a step further to decrypt the files, but there is no need to do so.