Is it possible to add a way to download files, and edit them, kind of like the way FireFTP does(for FireFox)?
In FireFTP, it lets you pick a program to edit certain types of files, and when you edit it, it saves it in a temp directory, and you can save it and upload it as many times as you want. It's kind of hard to explain, but if you try it, you'll get what I mean. Also, in the windowed part, you could have it so you could download, rename, or delete files and directories.
I know it's a lot to add, but I think it would be worth it.