You may be able to find a tutorial by Googling "AS2 slider tutorial" and similar terms. If you can follow the description below and you know how to code AS2, it may be enough to get you to a solution.
The general approach involves having an object that acts like a slider which you assign startDrag and stopDrag methods to, for onPress and onRelease events, respectively. The _x property of that slider object defines the _x of the image that it seems to make move via an enterframe event-based function that updates the image's position based on the slider's position. The full distance that the slider moves would be relative to the full width of the image (a viewing area-width less since the image would not go completely to the left). Essentially, if the slider is XX% of the way down its travelable distance, the image will also be XX% of the way down its travelable distance.
Thanks again, I'll research