1.Unpack rar in same folder as rom
2.Rename rom to Chrono.nds
3.Execute patch.bat and a DOS window will open, keep it open untill the process finish
4.A new file will be created named ctdsu-ttds.nds and the size is 83.8 Mb (This is the cracked rom, tested and working)
5.Just copy the newly created rom to the card
6.Play with no fear of flashing card or never ending time travel issues.