Dave: Unless you have frozen the herring individually, flat, and straight (i.e. on a cookie sheet) it will be hard to cut good strip out of the herring you have. It may be better to bring some to my place then we will go use them for halibut.
If you do want to learn to cut strip I can show you as I cut and fished strip for many years in Saanich Inlet as well as Sooke, Bamfield, and Gold River.
...Rob