Following on from the previous post re PDFaloud not offering you Stuart, Robert here in CALL has written a script which finds all the PDFaloud safe voice lists on your Windows computer and adds Stuart to them.

Here's what to do: 

1. Install Stuart first.
2. Save the file to your computer.
3. Find the file (it's called install-stuart-to-safevoices.zip.), double click on it to open or unzip it, and then double click on "install.cmd"
4. It will then update the PDFaloud safe voices with Stuart.
5. Restart Adobe Reader and PDFaloud should offer you Stuart.