Help on M£ ds simply

Hi anybody reading. I hope i got the right section this time.
Cutting straight to the chase, does anyone know how to use downloaded sav files from the internet on M3 simply cause i don't have a clue. Also on another topic does anyone know how to use all the cheats stored on the DAT file that you can download off GBA temp cause i only seem to be able to see a few of them.
Thanks

For save files, use: www.shunyweb.info
For cheats, read the common issues thread in this board.

Yeah i know that bit but what do i do after i convert the files

Put them on your MicroSD in the same directory as the ROM with the same filename. game.nds game.sav.