Infopath 2007 automate digitally signing a form template

Infopath 2007 automate digitally signing a form template

I need to deploy my form to multiple test and live environments and needs
to be signed and deployed for use within our internal windows domain. We
deploy the same InfoPath form for each environment, which gets rebuilt
during deployment with configuration to interact with a web service for
that environment.
Currently for each environment, I manually add a code-signing certificate
using InfoPath UI:'Form Options'->'Security and trust'->'sign this form
template' and select a certificate that I can have created previously.
This works quite well, but as I have multiple target environments and
multiple releases, I would like to automate this.
anyone know of a command line option, Powershell module or a c# API that
might help??