I don't know, I just know that Cearp has done it successfully.
...cearp, want to chime in here?

if you are on windows you can use 3dnus to do it very easily, if you are not you can use some my tools updatecdn + tmdedit
Would you recommend installing proper NVer + CVer or just spoofing them?

Devmenu is giving me program already exists. Should I use FBI instead?

if the program exists and you are installing a newer version, it will install.
if it is the same or a lower version, it will not install.
it does not matter what cia installer you use. (although one could be made to let you bypass the version check, but that check is in the fw, not strictly the app)

if the program exists and you are installing a newer version, it will install.
if it is the same or a lower version, it will not install.
it does not matter what cia installer you use. (although one could be made to let you bypass the version check, but that check is in the fw, not strictly the app)





