Using mercurial and beyond compare 3(bc3) as the diff tool?

Question

in windows I am able to use winmerge as the external diff tool for hg using mercurial.ini,etc.
Using some options switch that you can find in web(I think it's a japanese website) Anyway, here for example:

hg winmerge -r1 -r2

will list file(s) change(s) between rev1 and rev2 in winmerge. I can just click which file to diff

but for bc3:

hg bcomp -r1 -r2

will make bc3 open a dialog which stated that a temp dir can't be found.

The most I can do using bc3 and hg is

 hg bcomp -r1 -r2 myfile.cpp 

which will open diff between rev1 and rev2 of myfile.cpp

So,it seems that hg+bc3 can't successfully acknowledge of all files change between revision. Only able to diff 1 file at a time.
Anyone can use bc3 + hg better ?

edit: Problem Solved !

Got the solution from http://www.scootersoftware.com/support.php?zz=kb_vcs.php>scooter support page. I have to use bcompare instead of bcomp Here's a snippet of my mercurial.ini

 [extensions] hgext.win32text =  ;mhd adds hgext.extdiff =   ;mhd adds for bc [extdiff] cmd.bc3 = bcompare opts.bc3 = /ro  ;mhd adds for winmerge ;[extdiff] ;cmd.winmerge = WinMergeU ;opts.winmerge = /r /e /x /ub 

Answer 1

Beyond-Compare-3 is an amazing tool. I recommend a few tweaks to the setup:

[extensions] extdiff =  [extdiff] cmd.bcomp = C:\Program Files\Beyond Compare 3\BCompare.exe opts.bcomp = /leftreadonly  [merge-tools] bcomp.executable = C:\Program Files\Beyond Compare 3\BComp bcomp.args = /leftreadonly /centerreadonly $local $other $base $output bcomp.priority = 1  [ui] merge = bcomp  [tortoisehg] authorcolor = True vdiff = bcomp