How do you Transfer Dlc Map packs?

Im downloading the annihilation map pack on my old psn account that had money in gift card. So I used that im wondering if I can somehow transfer the map pack to my main psn acc. (Have 2 user accounts on the PS3)|||if both accounts are one the same os3 then there is no need to transfer! it will work since there is 1 HDD on ur ps3 it gets saved on all accounts. even if u had 12 accounts on there it will still work if u had DL it from atleast one. But if u get another ps3, u will have re-DL it|||DLC on one ps3 can be used by all accounts on the profile.