Sorry for the slow followup -- but I ended up getting a nice response from their tech support.
They were happy to provide me new MSIs for Kidspiration and Inspiration, but it turned out they were only for a network installation, so all they did was create a shortcut to a configurable network path.
After that, they confirmed that all the required files are installed to the respective Program Files folders and they recommended customizing one reference machine with registration info, etc, and then just capture the Program Files folders.
So, aside from installing the TTS components via MSI, there are "officially" no worries about missing any registry entries or other system files in a capture/repackage.
-ben
