Jerry Litynski , Nov 14, 2006; 06:59 p.m.
The NEF file (from a digital camera) has shooting information/data: shutter speed, ISO setting, meter used, and more. From a 'slide' in NEF format, none of the shotting data would be a part of the NEF file.
If you have Photoshop CS2, you may download a recent (N80 format) program that will allow Photoshop CS2 to edit a 'NEF' file.
You may consider just going with .TIFF files, and edit as you wish using Photoshop CS2.