The last stable, truly "full" version for Nero 7 was (or sometimes labeled as FLAC plugin v1.0.2 for legacy Nero). This plugin was freeware but was often bundled with a "Nero Pack" that included plugins for APE, WV (WavPack), and TTA.

For a "full" experience that covers more than just FLAC, the is a comprehensive solution. It installs multiple codecs simultaneously, adding support for: Audio : FLAC, WavPack, Monkey's Audio (APE), and OGG. Video : MPEG-2 for SVCD and DVD creation. Modern Workarounds

The "deep story" of the FLAC plugin isn't about the software itself, but about the digital underground that refused to let quality die in the age of the 128kbps MP3. The Quest for Lossless