SCard Using Partition tarball

Hello friends,

I have gone through the link below
http://processors.wiki.ti.com/index.php/Sitara_Linux_SDK_create_SD_card_script#SD_Card_Using_Partition_Tarballs

Enter path where SD card tarballs were downloaded :

from where i’ll get this tarballs?
do anyone has a link for that ?
how can i prepare a script ?
mk3PartSDCard on http://processors.wiki.ti.com/index.php/How_to_Make_3_Partition_SD_Card how it works ?