Now with Flash 8, Macromedia has released a new installer for using Flash Remoting with Flash 8. This installer will install the Flash remoting components, AS classes and panels in the appropriate locations with respect to Flash 8 installation. This installer will cater editing the .
Here is what you can do to make these files work:
If you have Flash MX 2004 installed in your machine, and you had Flash remoting MX installed over it, you will be able to reach the Program Files\Macromedia\Flash MX 2004\en\Configuration\Include folder. This folder is where the remoting installer installs all the AS files that are included to implement remoting. The following files should be available in this folder:
Copy all the AS files form this location, to the same folder as your .fla file which uses Flash remoting MX. Compile the .fla file, and it should work now!
And if you want the remoting related panels (netconnection debugger and the Service Browser) as well, copy the NetConnection Debugger.swf and Service Browser.swf from Program Files\Macromedia\Flash MX 2004\en\First Run\WindowSWF folder and add them to Program Files\Macromedia\Flash 8\en\First Run\WindowSWF folder.