How do I batch change photo DPI settings

My dumb OCR software will refuse to OCR an image if it's lower than a 96
dpi 
setting in it's properties.
It doesn't care that the pixel dimentions are much higher than some other 
much smaller pixel dimention
file if it's properties say it's dpi is under 96 dpi.

So, how can I batch change many image files (usually JPEG's) to a
particular 
dpi property setting?

I'm using Omipage Pro 14 to do the OCR.

Thanks.