A scarf valance only needs edge stitching. first you must have a sewing machine. or you can get that tape that thet use to finish edges from a craft store. Jcpenny and Linen N' Things sells great scarfs.
Either will work but it really depends on your decorating style. I personally think a decorative cornice would be elegant and a valance would be functional and practical.
The reason there are so many colognes out there is because different smelling colognes react and smell different with different people's natural scents!! You need to figure out which kind makes him smell better. If he already has a favorite, he proba...