Hey delt_o
The flash files(*.fla) have been saved in the Flash CS3 format. They would not open in Flash 8. I think you are getting a “unexpected file format” error message.
I am not sure if saving them in the Flash 8 format from CS3 would work - When I tried to save it , it said “Following data would be lost - actionscript 3”, which is needed to run these programs.
I would suggest you to get a copy of Flash CS3. If you are familiar with Flex Builder 3, you can also consider working in that.
cheers