I noticed something peculiar about the 3DS Download Play application. Namely that I can get modded MK7 tracks though to my nephews 3DS despite it having the latest firmware. This have got me interested in seeing if it's possible to send 3DS homebrew packets in form as data from modded games that support Download Play. I was wondering if anyone has looked into the Download Play service and how it can be used to enhance homebrew. Going to it's wiki page on 3dbrew, it appears that the host 3ds broadcasts a .CIA file that contains" a certificate chain, a ticket, a TMD, and the actual application itself, in CXI format." I'm wondering if it's possible to switch out the CXI with another. I'm not smart when it comes to this kind of stuff which is why I'm asking for more help on this.