Simple Feature Request: File Exist Rule for when File Doesn't Exist

[Tcalp]

I am a web developer and am generally updating content far more often then I am uploading new content. I often find myself uploading files into the wrong destination directory.

It would be really nice if there was an option to set 'If file doesn't exist' .. 'ask'

Any chance this coud get implemented in the semi-near future : )