This question was posted in response to the following article: http://help.adobe.com/en_US/aftereffects/cs/using/WS3878526689cb91655866c1103906c6dea-7e84 a.html
Hi there- I wrote a script that may be relevant to this page.
Click = Isolate in timeline, shy and lock other layers.
Shift Click = solate layers based on label colour (CS5+).
Alt Click = Isolate in timeline with solo, shy and lock other layers.
Alt & Shift = Solo selected layers in timeline.
Thanks - Alan Eddie.
Also another, Layer Groups - is available now too, May 2013. (For people who like the fold and expand paradigm as in Photoshop.)