iPhone dev: Get keys (public / private)

I'm using another computer than normal to do iPhone dev.

Now I'm trying to get my apps onto my iPhone, but fail with the certificates, keys and stuff. Refer to this thread: iPhone provisioning problem: Public/Private Key

Actually I'm able to download my cert no problem from Apple's site, but how would I get at the keys ne开发者_C百科eded? (private, public), I see no way of getting them...

I did this the other day and it is easy as pie! Apple even has a guide on how to do it! You want the very last section, Managing Your Digital Identities.