Diffing M$-Word

At work I have to write a lot of reports using M$-Word and found that git is capable of managing these in an easy and meaningful way. However, diffing of course does not work. I checked the web for solutions, but somehow, I did not hit the correct search pattern.

I think it should be possible to define Word itself as the external diff tool, as described in one of today's posts

 >  git config --global diff.tool TestTool
 >  git config --global difftool.TestTool.cmd "C:/Programme/Microsoft 
Office/Office/Winword.exe" "\$LOCAL" "\$REMOTE" "\\mSomething"

i.e. open both versions and auto-execute a macro, which in turn will do the compare. Well, just an idea, my knowledge about the M$ and Windoze in general stuff is weak. Has this or something else been tried? Is there any howto for this around?

Probably a similar approach could be chosen for OOo - for me as a TeXnician, using git is straight forward anyhow. ;)

Regards,
 - lars.