Keeping track of game progress


i’m making a game with six scenes (each is its own swf file). when the user has finished one scene, they are taken to a menu where they can select another scene to play. the client has asked that as the user progresses they can still select a completed scene, but the name should have an ‘X’ through it (or something…). then, when all the levels are done, they go to a “you beat the game” kind of screen.

can anyone teach me how i can do this? is it possible since each level is it’s own swf?

thank you for your help!