I hate to be the bearer of bad news--I\'d like to think my job is to inspire people, not shoot them down--but I need to clarify a few things in your post.
Firstly, and most importantly, unless you have Spanish nationality and speak Spanish fluently AND pass some sort of VERY DIFFICULT entrance exam (I forget the name of it), there\'s no chance you\'ll get a job at a traditional/public highschool in Spain. Those jobs are, 99.9% of the time, reserved for Spaniards. There are, however, Catholic/private schools, but they generally hire devout Catholics, bilinguals or Brits.
Secondly, your teaching experience is a great asset, but having lived and studied in Spain in inconsequential, unless, of course, you still know people and have maintained contacts.
Thirdly, it is VERY DIFFICULT for an American (no matter what his or her experience) to find LEGAL work in SPain. You would probably have to settle for illegal work at first, that might turn into a legal, contract position.
I know this sounds depressing, but you need to be realistic. Please read the "[!-- BBCode Start --][A HREF=\"http://www.expatriatecafe.com/teach_english.php\" TARGET=\"_blank\"]TEACH ENGLISH[/A][!-- BBCode End --]" section of this website for further info on what is realistic and probable.
One other thing, dkmarsh mentioned a possible opportunity that might very well be realistic. But try contacting them first in the States, and then once in Spain!
Good Luck!
Tracy[addsig]