Are you sure I don't need to do anything else?

I followed the instructions so that I can replace Zero Suit Samus' texture, but nothing happened. Do I also need to replace the normal Samus' texture? Did I perhaps mispell something? (I used the file titled as is. It had capitals, but otherwise was exactly as in the list)

Also, I want to use this with some codes. So, can you post the code for this?

Sorry if the answers are elsewhere, but the thread titles are a little confusing