nukeNAV, like nukeSEO DH, requires careful integration with features that are built into RavenNuke. Since those features (namely, the process for loading JS and CSS) aren't part of nukeNAV, they would have to be replicated by each webmaster. That's not a simple task, and the effort necessary to support it is currently prohibitive.
We are working on truly flexible menu management, with the current nukeNAV as the default, but the ability to override it and add additional menus and options.
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