Hacking Routeinfo

[VNSMB]

Hey guys,
I'm new here and I have two problems.
My first problem is:
I want to edit the world maps in New Super Mario Bros. Wii. Can I do it with Blender or are there other programms?
And my second problem is:
I want to edit the route Mario is walking on. I found a file in the Game named Routeinfo. I can edit the file with Microsoft Excel but I don't understand the meaning of the content in the file. How can I edit it without killing Mario's Route haha

I hope you can help me,
Thanks alot!