You can record actions, windows > actions if yours isn't up.
Open one image, press 'create new action' name it, it will be now recording what you do.
Set the image to how you want it, save and close the image down. Now press stop on your action record.
Now your set to change a whole range of them.
You will need to open up about 200 images (try not to go well over 200 images opened in PS, you may only be able to open 50 depending on your PC I guess) and keep pressing the play button on the image or the shortcut key if you set one.
just a brief way of doing it that I use.