Yay!!! Finally it works! (phew)

I looked again at the save from the WIISAVES/RUUP folder and the Red Horned Hat was on there. And then I looked at the save in the folder sd:/savegames/0001000052555550

This is where I have now found that the Savegame manager extracts/installs to/from, meaning that my Wii reads only that save.

I'm guessing that this means that I should change the dlcsetting from <sdirname>sd:/WIISAVES/RUUP/</sdirname> to <sdirname>sd:/sd:/savegames/0001000052555550/</sdirname> ?

Thanks for you help, I knew that you'd be the only one to help (my partner didn't know what the problem was, and he's more clued up on modding than I am, lol)