Guide to install Android 2.2 manually on your Nexus One

[rizwanapps]

Apparently at some point last night a very select few Nexus One owners started getting the Android 2.2 update OTA. So if patience is one of your major virtues you should feel free to hold out for that update notification to hit; if on the other hand you would rather just go ahead and get your Froyo on now just follow the directions below.
Note that this has only been reported as working for T-Mobile users so far and if you are currently rooted you should get yourself back to stock before running the update.
To manually install Android 2.2 on the Nexus One, perform the following steps:

1. Download the official Android 2.2 firmware for the Nexus One here. Link dead see update.
2. Copy the file to your microSD card and name it update.zip (newb warning: not update.zip.zip)
3. Power off your phone.
4. Hold down the VOLUME DOWN button and power it back on.
5. The phone will now search for files like PB00IMG.zip, etc. This is normal. Scroll down to recovery and press the POWER button.
6. When you see the “/!\” symbol, press the POWER button and the Volume Up button at the same time. You should be presented with a menu and one of the options should be “Apply sdcard:update.zip”.
7. Use the trackball to navigate to “apply sdcard:update.zip” and select it.
8. When you see “Install from sdcard complete”, select “reboot system now”.

Enjoy and once you’ve had a chance to play for awhile let us know what you think.
Update: The original link is dead, options still reported as working.
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Update 2: A response from a Google employee to the question of whether users that have manually installed Froyo will also get the final OTA update and whether they have voided their warranties was posted on XDA. The relevant portion reads “When 2.2 (Froyo) is sent via OTA, everybody will get it, including those who have already manually updated to Froyo. No, your warranty is not voided by manually updating to Froyo. But we do recommend waiting for the OTA if you’re still on 2.1 / Eclair.”

Source http://www.appshippo.com