Edit a pre-existing custom theme mym file
I want to be able to edit an already made custom wii themes, in very minor ways. Such as changing the Health screen background, or the cursors. I understand that mym files are just compressed zip files that can be unzipped with Winrar, 7zip, etc.
I have the TPLMii program for extracting the png images from the tlp files.
Recently I tried editing a Majora's Mask theme. I made sure the image sizes were right before converting them into tlp, with the original tlp file names.
Health screen: 608 x 456
Wii cursor: 64 x 64
I then compressed it again, using winrar. I typed mym as the output file extension.
Creating the CSM and installing resulted in a brick.
I wanna know the real way to edit a custom theme. I've searched everywhere, can't find any info on editing an existing theme, for personal use. I wanted to create a funny theme for my friend's wii, out of the Majora's Mask one.
Any theme creating theme experts exist on Wiihacks?
Help with this would be much appreciated