Learning From My Lessons: How to do Folder Stuff
As
@Robz8 can attest, I've had a couple issues with TWLmenu. Some of them have been fixed, and I've noticed that the guide doesn't mention a couple of them as far as I know. Here's how to enable all the folder-based stuff I know of- some of which is mentioned here, some of which isn't.
Boxart- make a "boxart" folder in the TWLmenu folder and put PNGs (size depends on system- 128x115 for DS) in it where the name of each PNG is the four-character game ID of the rom. You can find a link to a pack of them and the full instructions on the main page.
Cheats- make a "cheats" folder the same way and download a "usrcheat.dat" file to put in there. Found on the main page.
Themes- To change the color or style of each menu theme, go into Twilight Menu settings (the file, not in twlmenu itself) and edit it. I'd recommend changing DSi to "White" and Acekard to "switch calendar" but that's just me. You can also go into each theme folder individually and edit stuff if you want to- for example, I wanted to use the small selection box instead of the large one in Acekard's switch calendar theme but it wouldn't let me, so I... renamed the two so the small had the old name of the big.
Per-Game Settings- This is important, as it isn't mentioned on the main guide that I know of and I had this problem myself. To enable per-game settings and have them actually stay how you put them, make a "settings" folder in the Twilight Menu folder. That's it- the settings will show up in the folder themselves when you set them.