you need to open the file in flash eight then use “SaveAs” and save it as a FlashMX2004 file. (save it with a new name) If there were any Flash 8 specific effects used in the original, they will be lost. You’ll then be able to open the new file in Flash MX2004 pro.
Oh yeah, and once you’ve opened it on Flash MX 2004, you’ll have to do the whole “Save As” routine agin to get it down to Flash MX. Or you could get Flash eight for the other computer and be done with it.