i'm fairly certain you can put everything into a group or parent it to a so called control curve (just a curve that you parent everything to)
just scale the group and everything under that group will scale
i can't remember if you had to freeze transforms on everything under that group though or if that was to scale something else
try it and see
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D