Psn card question ././

Im thinking of buying a $50 psn card and i have a few questions.

If i buy it, all the money will go on my Australian account wont it ? Meaning i wont be able to buy dlc for games like fallout 3 that i own that are different reigions? Or does the money go on the ps3 overall and i can go to the US store and buy the dlc?

Sorry if this has been asked 1000000 times i just want to make sure :)

If i later use a debit card, can my AUS one be used to put money into my other region wallets so i can get the dlc?

Shame sony went and made the games region free but not the psn...

Im thinking of buying a $50 psn card and i have a few questions.

If i buy it, all the money will go on my Australian account wont it ? Meaning i wont be able to buy dlc for games like fallout 3 that i own that are different reigions? Or does the money go on the ps3 overall and i can go to the US store and buy the dlc?

Sorry if this has been asked 1000000 times i just want to make sure :)

If i later use a debit card, can my AUS one be used to put money into my other region wallets so i can get the dlc?

Shame sony went and made the games region free but not the psn...

OMG bugger this, oh well sorry sony you just lost me and my 200+ dollars.

No way im going thru all that, even on ebay theres no american ones which means i would have to import ( way too much postage )