Hi Soundbarviolatr,
Normally you'll need a JAA licence to fly commercially in Europe.
An option for you is to apply to Ryanair. I know there is a few American guys flying on FAA licence with some kind of validation. With the type of roster they have for contractors (5 days on, followed by 5 days off) you could live in Spain and commute to whereever you are based for work.
I'm not sure what the corporate market is like in Spain at the moment. I also don't know how it works with visas...sorry.
W