Nikon d40, how do i name pics?

Hi when i take a pic it automatically gives it a.jpg name, this is ok, but say if i take 25 pics, so start a 001.jpg up to 025.jpg then when i clear them of the camera, take another 25, and want to put them in the same folder, i can't because the already have that.jpg name, is there anyway i can save the pics by a date stamp or other way,

hope this makes sense, thanks

There should be an option to sequentially number the images and not reset the camera to image 001. Check the menus on your camera.

Highlight File No. Seq. In the Setup menu, press the multi selector to the right, and choose On.