inFamous 2 Hero Voucher Question

[sega4life]

OK so my Son unboxed the Hero Edition inFamous 2 box and we got the Hero Voucher inside for the Kessler Skin, 24crt Gold Rod, Powers, and Soundtrack..

Now for my question:

Can we both use this voucher? Meaning, if he uses the code for his account, can I have the Gold weapon and powers when I play under my account?

Also I have the master Account, he has a Sub account on my PS3, does it make a difference on what profile/account we install this voucher on?

Thanks in advance.