How about having a list of file extensions (for e.g. pictures) and options to
append 001 to the old file's name so the file doesn't get overwritten when
it's updated?Many hosting sites like to replace images with dummy "bandwidth
exceeded" images that have the same file name but contain garbage data. It
sucks to run httrack on a site and blow away all your archived images because
the host decided to replace the images with garbage instead of returning a 403
error.