I got a used DS Lite, came with a USB charger. Can I hack my DS Lite with this?

sorry but i dont think there is sutch a thing as custom firmware for ds if u wanna get free games buy an r4 card u can put as many games as u like on for free as well as music and stuff( vids too but they are harder) i dont realy know what you would do on a computer idk maby you would get acsess to the game files on ur ds card and maby you could put new ones on but i doubt it would work