Trouble Mnually Updating HTC Evo

[lisalover1]

I'm trying to update my HTC Evo to Froyo right now, since HTC just released the update to those who want to manually install it. However, I'm having a bit of trouble. I was told to rename the update file to "update.zip", and put it into the root directory of the phone's SD card, which I did, and then restarted. When the phone started up, I held down the "Volume +" button like it said to do, but the menu that came up didn't have any option to install an update from an SD card; all it had were some bootloader options, and an image at the bottom of 3 androids on skateboards. What am I doing wrong? I really, really want to get Froyo installed on my Evo!

 

[lisalover1]

Okay, I realized that I had to select "Recovery" from the aforementioned menu, but when I do that, it just shows me an image of a phone with a red "!" in a triangle, and nothing else happens. I've let it sit like that, but it doesn't change.