Hi Nuri, if you check the manual, you will see that scripter has events that are fired before loading/saving the files. You can implement handlers to those events to intercept the saving/loading mechanism and use any media you want.
Note that there is not always a form file associated with a script. There are scripts that have no form files associated to it. The IDE engine must know in advance if the form "file" exists or not. Since you are not using real files, you must tell the IDE if there is a form file for a specific script. You must use OnCheckValidFile event for that.