Is it possible to automatically number file names in a increasing series within any folder for example a folder filled with photograph images: i.e;

4 Files with File Names

DSC_005, DSC_00012, DSC_00030, DSC_00054, ETC...

Automatically Renumbered in order to;;

1_0005, 2_00012, 3_00030, 4_00054, ETC.

As you can imagine this can take a considerable amount of time when done manually with folders in excess of 200+ files.

Any Suggestions eagerly awaited.
Thankyou.