где-то так?
Правда, не знаю, подойдет ли тебе такое решение
Очень уж оно чайниковое
Цицирую help
«To change the printed background color:
1 Place a filled shape that covers the Stage on the lowest layer of the Timeline that will print.
2 Select the shape and choose Modify > Document. Select a color for the printing background.
This changes the entire movie's background color, including that of movie clips and loaded movies.
3 Choose from the following options:
To print that color as the movie's background, make sure that the frame in which you placed the shape is designated to print. For instructions, see Designating printable frames.
To maintain a different background color for nonprinting frames, repeat steps 2 and 3.Then place the shape on the lowest layer of the Timeline, in all frames that are not designated to print. For instructions, see Disabling printing"...»
«...1 Open or make active the Flash document (FLA) that you want to publish.
2 Select the first keyframe in the main Timeline.
3 Choose Window > Properties to view the Property inspector.
4 In the Property inspector, for Label enter !#p to specify the frame as nonprinting.
You need to specify only one !#p label to dim the Print command in the context menu.
»