Ok!! no one help!! thanks!!
But I find the way already. Is not necesary to softmod, You just need to buy : R4 SD (search for it), Micro SD card. Now just download few games to pc, unpacked (from .rar) And now copy those games to your micro SD card, put the micro sd card intro R4 SD, put the R4 SD into your Nintendo DS, turn it on, open it like a regular game, now you have the list of the games you put in the MicroSD card. Now time to play. Enjoy!!!
Ahhhhhhhhhh but first you have to copy some files to your MicroSD, download it from here :
unpack and copy the way it is to you MicroSD.