BootsnAll Insiders

Does anyone know a good agency through which to book an English-speaking driver/car for 9 hours RT (Nov 5, 2009) Cadiz to Seville, with stop in Arcos de Frontera. Journalists seeking something other than high rates geared to cruise ships! Need flexible itinerary. We could rent car, but fear parking, logistics, etc might be difficult. Reply ASAP. Many thanks.