I purchased a 2000 Edifil catalog to identify my Spain material not listed in Scott. Here's my collection of the Plan Sur de Valencia stamps. The Edifil catalog has 11 listings plus a variety of the last issue (ordinary paper vs. phosphorescent paper).
I don't have them all, so the missing stamps can be viewed in this thread: http://goscf.com/t/18406
I hope this helps those of you who have these stamps in your collection unidentified.
Edit: Replaced image for one without Photobucket watermark.