configuring external merge tool in qconfig

[Ewan Milne]

Hi, quick question on something I didn't expect to be this hard;
reassuring I find I'm nnot allone -
https://bugs.launchpad.net/qbzr/+bug/416927

I'm trying to configure KDiff3 as my external merge tool in Bazaar
Explorer through qconfig. It's not clear how to do so - I have KDiff3
and the extmerge plugin installed, but what do I need to provide as
the Definition in the Merge tab of the qconfig dialog?