(adsbygoogle = window.adsbygoogle || []).push({}); How would I get the DLC's and place them on my PlayStation 3 via FTP server instead of downloading them from Infinity Ward and the PlayStation Store?

Thats not possible,
Every time a DLC is placed in a PS3, it needs to be activated by a file which comes from Playstation Store, even if you do manage to get it in your PS3, it wont work, I've tried it many times myself