TwlNmenu
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TwlNmenu is the name of an application that comes bundled with TWLSDKs and the SystemUpdater. This application installs TAD files, an installable archive developed by Nintendo, similar to the Nintendo Wii's WAD archives. TwlNmenu is able to install all types of NAND programs, however the NAND tab will only display user apps (TIDs starting with 00030004). This may have been done to prevent developers from erasing necessary system programs.
TAD File Format
The installable format, TAD, shares many similarities with the WAD format, including using the same offsets for title ID's and even using the same devsign as WADs. This can be explained by a commit to TwlIPL[1] where there's a mention of the WAD format being renamed to TAD. Because TADs are derived from WADs, they can be resigned using Wii resigning tools and an RVL devkey; however, TwlNmenu has anti-tampering methods which will prevent you from installing resigned TAD files.
The TAD format can be created using a tool included with the TWLSDK, named Maketad[2].
Screenshots
TwlNmenu on the home menu.
Start screen of TwlNmenu. It shows all applications installed in folder NAND:/title/00030004.
TwlNmenu asking if you want to install the chosen application.
TwlNmenu installing an application.
Back on the homescreen, you can see an application has been installed.
This lets you delete private.sav in the application folder.
TwlNmenu asking if you'd like to delete a 4SPA file
Lets you delete all apps with the same "CompanyCode".
TwlNmenu showing the size, title ID, the size of the save files, and so on.
The SD Card menu can do the same.
TwlNmenu asking if you want to import all TAD files in the folder you're in.
TwlNmenu importing all TAD files.
