transparency is pretty tricky and not something I have mastered yet for import into Flash. I for one do not use import to bring ine xternal images such as gifs and jpgs.
I simply copy them in fireworks and paste them into Flash....just seems to be easier and works great. Once in Flash simply select the image and select Insert/convert to symbol (F8) and save it as a graphic. this puts it in the library and no matter how many times you pull an instance of the graphic out of the library and onto the stage it never raises the file size more than it would if you only used it once.
As far as layers and frames.... I usually set up all my layers right from the start...
Actions
Frame Names
Buttons
Main Content
Movie Clips
GUI
BackGround
just to name a few I commonly use.
to set up the first page(frame) ... put your buttons on the button layer, any special background fetures on the background layer, text on the text layer, and so on. If youi need some interactivity or some action using tweening or motion guides just insert/new symbol to create a new movie clip and insert it into your movie clip layer.
be sure to put stop() actions in your action layer or it will keep trying to loop the timeline once you get more than 1 frame.
to move on to a new page(frame) hit F6 on each layer and do the same thing again. (Note: any content that will not change from page to page (background for example) simply select several frames over in that layer and hit F5. depending on how many pages of content you want.
once your pages(frames) are set up... you can name your frames by selecting the frames in Frame Names layer and then select the frame tab in the instance panel and type the name in the area specified.
to navigate from frame to frame you will need buttons. insert/new symbol/button
right click on the button and select actions... in the left window select Basic Actions and double-click on goto and Play.
select the goto and Play action in the right window and you will see boxes at the bottom of the dialog box that can be filled in.
simply select the drop down arrow in the center (2nd) box and select frame names.
in the bottom (3rd) box ... click the drop down arrow and select the frame name you want to move to....
(Note:you can also select frame number in the 2nd box and then type in an actual frame number to move to in the 3rd box.)
I suggest trying this much and then posting any specific problems you may have so we can be a little more specific with the help.
hope this helps a little.
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