Flash Updates to existing Flash

I have a flash file that needs more things added to it. We have 3 images that need to fade in and out during the process of the movie, and about 8 button style logos that need to slowly fade in at the bottom of the page during the movie - all at the same time. We already have an audio file and need another file copied exactly and the audio replaced with a new file. So we will have 2 flash files identical except for the audio file. I need this flash edited as soon as possible. My original designer is unable to complete this project for me in the time allotted.