ThemeMii is a manager for Wii Themes. The .NET Framework 2.0 is required to run this application!

Current features:

Load mym files and edit them
Create new mym files
Create a csm from any mym
Create a mym from a csm
Browse through base app’s for path’s (including TPL preview)
Download base app’s from NUS
Automatically manage source’s and image width and height

http://wiibrew.org/wiki/ThemeMii