1. Extract them with WinRAR (google)
2. Download emulators (.nds files) (google)
3. Put extracted files and emulators on card
4. DLDI patch if you need to (google)
5. Don't be disappointed when you see Chono Trigger doesn't work that well on the DS.
Thanks myuusmeow, that helps me a lot, and yeah, it doesn't work as well as I hoped but oh well, it's not
really about the Graphics or speed it's about the awesomeness along with the joy of playing one of the best
16 bit era's RPGs on my DS.