Software program for talking pumpkins!!

What is it that you are looking for? There are many videos available if you want to project onto the pumpkins. Are you looking for one that talks with a custom script like "Welcome to Jamie's haunt?" Are you trying to have a "mouth" that actually moves? If so there are many tutorials on talking skulls. You could do something similar with a Funkin.

We need more information! Right now time is not your friend with a week to go...

If you are looking for audio software where you can mix music with voice, I use the free software Audacity. I have used it for multiple props that I have build including my latest this year.

I also use Audacity. You should be able to search YouTube for audio and then convert it to mp3 using one of the free websites that you can find via Google. Audacity is very user friendly and easy to manipulate.