Integrating Deltawalker for Mac OS X and Mercurial's extdiff extension

I'm doing an eval of Deltawalker and while it seems to be a开发者_开发技巧 great tool, there isn't an obvious way to get it to integrate with mercurial so that I can do;

hg extdiff -r some_rev -r some_other_rev

Anyone know how to configure .hgrc to do that?

As suggested in this Meta answer, I'm moving the OP’s answer posted as an update into a real community wiki answer. —Helgi

See below, the nice folks at DeltaWalker answered via email. Before anyone asks, I have no connection with DeltaWalker, I'm just looking for a good Merge tool for MacOS. Until now I've been using Meld (also on Linux) but a recent update to macports broke it badly.

In the upcoming DeltaWalker release we've made integration with Mercurial a whole lot easier. As easy as a single click, actually. Please grab the following download:

http://www.deltopia.com/downloads/deltawalker-31-oct-2010-1-macosx-cocoa.dmg

And after installation simply go to DeltaWalker > Preferences > General > SCM Integration, then select the checkbox next to the SCM you want to integrate DeltaWalker with. It should do all the work for you. Please let us know if you encounter any issues.

Then Help has also been updated to reflect the new functionality; if you need to consult it, just bring it up and search for 'SCM' for example.