You should be able to download/install the trial version of CS5 and use that to save as CS4
Be sure to follow the steps outlined in the Note: Very Important Instructions section on the download pages at this site and have cookies enabled in your browser or else the download will not work properly.
Thank you! Unfortunately the links on that site do not work for me, but I've found another site.
You need to follow the instructions to the letter or else the downloads will not work. Where else did you find the trial versions?... you can help someone like yourself by indicating that.
Ohh I must have missed a step on that page, but I found a trial version at Adobe Flash Professional CS5 11.0 Download (Free trial) - Flash.exe
Nevermind that site doesn't work... I just try it. Anyway, a friend of my happens to have 5.5, so I let her do it for me. Apparently my SWF history got deleted though, I don't know what that is.