How to get Cydia on my iPhone 2g?

I just jailbroke my iPhone 2g and I didn't get Cydia. I tried using OpenAppMarket, but none of the Cydia downloads worked. Can someone please help me?

1. Tap the "Cydia" icon on your iPhone's home screen.
2. Tap "Upgrade Essential" when the pop-up window appears. You'll only see this window if Cydia is in need of an upgrade.
3. Choose "Confirm" on the next screen and allow the Cydia upgrades to install.
4. Tap "Close Window" when the Cydia upgrades are finished installing.
5. Press the "Home" button to exit Cydia and then open the application once more.

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