MSMs and MSIs of Microsoft's Speech Engine

MSMs and MSIs of Microsoft's Speech Engine
Greetings all,

Is there a trick that is needed to get Merge Modules (.msm files) to install correctly?

I've created an install which needs to install the microsoft SAPI 5 speech support. MS's speech support is given in the form of .msm files. When I try to install the .msm files directly, they don't seem to successfully enable the speech support.

I created a blank .msi install (that only installs the .msm files) and it gives me the correct support, so I know which files I need and that it *can* work. I've visited other posts which have told me how to install .msm files by themselves (basically they say to use 'msiexec /i "<filename>.msm"') and this *seems* to work in that it says that it is 'installing...'.

I've tried installing them manually and it doesn't work. Short of the MSI, I've not been able to get the speech to work, and I presume that's because the merge modules haven't been installed correctly.

Am I doing something wrong? Has anyone else had any similar problems getting .msm files to install correctly?

Thanks,
Luke