Sorry if made you waste time but i think i found another way to re-compress the files. Someone mentioned the CriPackedFileMaker in this forums, and after some search i found the CriPackedFileMaker 1.36 and it was able to re-compress rootR.cpk without problems!
Here is how i did it:
1: Unpack wii's tales rootR.cpk with quickbms and the cpk_unpack_uncompress.bms script
2: edit any file you want. (optional)
3: open CriPackedFileMaker.exe, select the folder of the unpacked files (if you did i right, it will show a list with all the files, sizes etc)
4: click "Build CPK file...", select the new file to save and:
- Data Align: 2048
- File Mode: ID+Filename
- uncheck: Try Compression
- uncheck: Mask Directories Information
- Check: Output Header Definition of ID numbers
5: Click "Start to Build" and wait....
6: Use your favorite tool to replace rootR.cpk in the wii iso file or make a new wii iso (i'm using Wit to remake the iso).
Done! i hope this will be useful for someone else too.
Now just need to find a way to do a correct edit of the scs (skit text) files (they are a little different from the ps3 scs files, Attached), and there is some sort of "tags" like, color tags (see the screenshots, first one edited with SCSEdit_101). At least, for a first attempt, it is working.