TMPGEnc DVD Author 3 now includes both DVD authoring and DivX authoring. DivX authoring allows DivX files to have DVD like features (menus, subtitles, multiple audio), while still only using a single file (.divx). These kind of DivX files (called "DivX Ultra"), are even playable on DivX-Ultra certified DVD players, complete with all the advanced features.
DivX.com also releases a software called DivX Author, which is basically TDA without the DVD authoring part.
To find out how to make DVDs with custom menus, audio, subtitles ... please read our TMPGEnc DVD Author 3: DVD Authoring Guide.
To find out how to make DivX files with custom menus, audio, subtitles ... please read our TMPGEnc DVD Author 3: DivX Authoring Guide.