If you have the nettalk global extension in your app, its already there.
But, to answer your question, you just put that text into one of your global embed points. I forget which one specifically offhand, but one of the ones which inject code into the export (EXP) file.
(I’ll dig out the exact one when im back at my computer.)
Ill add that its almost certainly not necessary for a desktop app. 2 gigs is plenty for most desktop apps. But it does no harm.
update: The embed point is “Inside the Export List”.