It's also possible to do this in Chimera's sidebar/info window. For those with memory spans of only 3 words ;), here's instuctions:

1) Show the sidebar.
2) Select a folder.
3) Get info.
4) Check "Tab Group".
5) Close info.

For reference, I'm using Chimera Nightly 12/2 (Build ID: 2002120204).

That option doesn't exist in my build -- I tend to stick to the major release versions of anything I might be testing with...

-rob.

The nightly builds are very stable and I love getting all the nice updates, like keychain support (That's not in stock v0.6, right?) and the fact that whenever I download something, it doesn't ask me where to download it anymore! (unless I hold option while clicking). Numerous other changes as well make the nightly builds much easier and better to use than stock v0.6.

And if you use ChimeraKnight, your previous version is automatically backed up, in case the nightly build is screwed up one night!