Rename files in subfolders with change a the same time?

[HowIsThat]

Hi,

I have photos of a product in 10 colors. Each color has its own subfolder in which the photos for that color are placed.

Now I want to change the name of photo 1-100 in each folder at the same time. After that, 101-200...

Is this possible?

[therube]

Explain further, if you would?