My friend asked me to create a program so he could rename multiple images at once, so I decided to make one.
I'm not sure if you have any use for this, but if you do, this should help your renaming process at least a bit
Instructions are in the program.
Download: Kuvajuttu via deviantArt
If anyone is wondering, the name is Finnish and means literally "Image thing".
Tried to create as beautiful appearance as I could, so please give me some feedback.