What about getting RID of the file selector, and just using the normal file views + drag and drop to open and save files? Drag a file to your word processor, and it opens. Drag the tab from the word processor to a disk, and you save. Drag a section of a file, and you save that section. Drag that section to the desktop, and you save a cut buffer, and you can have as many cut buffers as you want.

Hell, why can't I just drag a file to a printer icon to print it? Why do I have to OPEN the file, then print it?