op, i've changed it to:
var pageSafeAddress = page.url.replace("http://","").replace(/\/$/,"").replace(/\//gi,"_");

and it makes a bit what you wanted:
Files saved to:
output/www.perhapsme.com_marka_kumi.html/www.perhapsme.com_marka_kumi.html.1280x1024-2014-02-04T09:13:58.101Z-abovethefold.{css,js}