How does Steam link with PSN in Portal 2?

As many of you know, PSN is down. I want to install my copy of portal on my pc so that I can play Portal 2. Do i have to create a seperate Steam account, or am i supposed to log in with PSN or something? I guess what I'm asking is does it link your Steam account and you PSN account, or is it just your psn... show more As many of you know, PSN is down. I want to install my copy of portal on my pc so that I can play Portal 2. Do i have to create a seperate Steam account, or am i supposed to log in with PSN or something? I guess what I'm asking is does it link your Steam account and you PSN account, or is it just your psn account running the Steam network?
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