Taken from Groove's thread, he explained it better:
"Sashimi compliant, so all of your cabs, xml files, and more can be autoinstalled on first boot.
Simply download the attached Sashimi installer, and install to internal storage.
Then add your .cab files to the \Internal Storage\SASHIMI\Auto\Cab folder,
and they will be automatically installed on 2nd boot.
Click here to download Sashimi
Click here for more info about Sashimi"