Mappoint 2006 installer fails when it tries to install the Text to Speech Engine with
Error 1713: Cannot install one of the required products

I tried removing the English Text to Speech engine per MS KB article,
but still get this error.

I also tried an admin install (setup.exe /a) to c:\mappoint first, but then installing from the hd still gives the same error.

Could it be because I have MS Streets & Trips 2006 installed?

Any ideas folks?

OK I uninstalled Streets & Trips and no luck. I searched the whole registry for MS Text-To-Speech entries and deleted all, but it didn't help.