i'm sure there's a way to mass rename files.. adobe bridge can do it if you have that
if you're on a mac you'd use automator
if you have neither you can use the command line, but i don't know how you do that, i might be able to find out
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D