As far as I know ghost only works in Dos. So create a boot floppy and copy the ghost.exe to it. Boot from this and at the A:> prompt type "ghost"
You will be presented with the Ghost menu. Use the cursor and the enter keys to select Restore Partition from Image. Use the tab key to get to the file box and select the image location and ghost image file. Then follow the prompts.
I would recommend putting the ghost image on DVD or CD if it will fit. When you use ghost itself to create the DVD/CD you get the option to make it bootable (by copying a bootable floppy). It makes life easier. You don't have to worry about finding your ghost.exe
If you have lost the ghost.exe then you are stuffed until you reinstall Norton.
Try searching your harddrive for it.