I don't know what format RPGMaker2003 uses for it's characters, but I do know one thing for certain. A sheet like that would never work in any RPGMaker unless maybe you would custom script how it reads each and every frame, and I doubt you'd do that.
All RPGMaker sprites are required to be in a format. I work with VX and the default format is like this:
Each 3x4 block of sprites is considered one Character and this is the default.
I also have a script that Allows me to make Animations into battle characters , but I'd then have to format every sprite I wanted to use in a set of animation boxes which is 5x2(up to)20 with each box being 192x192.