You can turn panning off, and Google maps still might have been better for your purposes. It has many nice features such as an Event library, customizable over

You can turn panning off, and Google maps still might have been better for your purposes. It has many nice features such as an Event library, customizable overlays, and the ability to draw polylines and polygons. And you could have easily sliced up your artist's images into tiles. I think it would have saved you time, and probably left your client with more maintainable and extendable code. A lot of people know the Google Maps API.