Update in post 3. Somehow this slipped under the radar (it was released in early March) but we are here now. loveemu, one of the people responsible for initially reverse engineering the DS SDAT sound format, released a plugin kit using the susie plugin format (extension .spi) for both the fairly common DS SDK graphics formats (NSCR, NCGR, NCLR) as well as the ability to parse the nitro rom file system (the one initially* used by all DS roms and a compatible system in a good chunk of homebrew). Susie is not very popular outside of Japanese programs (list of a couple below) but it is still a plugin format used in many general image viewing and manipulation programs, the plugin format also has a somewhat of a history of use in rom hacking/game hacking/program hacking circles. *certain games like the first phoenix wright and tony hawks games rely on custom file systems/archives stacked on top of the nitroSDK file system. Homepage: http://d.hatena.ne.jp/loveemu/searchdiary?word=*[NDS] (largely Japanese language, some pictures available) Author's mediafire link http://www.mediafire.com/?wnmyydnz2n2 4shared mirror (11th of March 2009 version) nitroscrap-20090311.zip Programs that support SUSIE plugins (be warned there have been some issues with programs not totally supporting the format): Susie: http://www.digitalpad.co.jp/~takechin/betasue.html#susie32 linar: http://www2s.biglobe.ne.jp/~smas/ picture effecter: http://www.asahi-net.or.jp/~DS8H-WTNB/software/index.html stereophotomaker: http://stereo.jpn.org/eng/stphmkr/ (I would not suggest this for general hacking work as it does not edit all that well (it is not designed to) and crystaltile2 is a better viewer) vix: http://www.katch.ne.jp/~k_okada/ A to B converter: http://www.asahi-net.or.jp/~KH4S-SMZ/spi/abc/index.html ACDSee (commercial) http://www.acdsee.com/ Cyberdrive in a later post mentions XnView which is able to chain enough together to hopefully load them too. http://newsgroup.xnview.com/viewtopic.php?f=35&t=11715&start=60 http://gbatemp.net/threads/susie-pl...es-and-nitro-rom-file-sy.162863/#post-4747878 Note there are several more around, this is just a basic selection.