Hi All,
I am considering putting some of my images on a photo library site.
On checking their details for requirements I came across the following :

• Note for images from digital cameras - We strongly recommend that images are captured on a digital camera capable of producing files of 17MB and upwards (6 megapixels). Please then interpolate the images to a minimum of 48MB using professional upsizing software. We recommend Genuine Fractals™, although other professional upsizing software is equally acceptable, including Abobe Photoshop versions 7 and CS/CS2 (if the bicubic option is used). 

I have never come across this before so is there anyone here who can tell me in simple terms what it means and how to go about it.  
Thanks 
Eddie