Looking For Symbol Animation Tutorials And Flash

As others have said, you should distribute your symbols to layers. Select everything in the layer and right-click then select "Distribute to layers" and Flash will do it for you and name the layers what you have already named your symbols.

Flash does have built in snapping tools, make sure they are turned on in View>Snapping>Snap to Objects.

For your eyelid issue, you should use nested symbols. For example, make a drawing of your eye, convert it to a graphic symbol. Click inside that symbol and add a new frame, draw the eye half-closed, add a new frame and draw the eye closed. Go back to the main timeline, and click on the symbol. In the properties panel there will be a drop down menu with options: loop, play once, single frame. So you can choose single frame and enter the frame number of your eye closed. If you want the eye to keep blinking you would choose loop, if you wanted it to blink once choose play once. At any time you can add a new key frame and make the eye do something else. Here is a tutorial: [link]

Swapping symbols is easy. Set a keyframe where you want the swap to happen. Then right-click and choose swap symbol, then select the symbol you want. Things to keep in mind: The new symbol's transform point will align with old symbol's transform point. Your new symbol will inherit any scaling or rotation your old symbol had. It is very important that you set up your symbols correctly. Always try to keep the transform points in the same spot, and try to draw them all at the same size, so you won't have to keep going back and fixing things. Here is a tutorial: [link]