If you already have root, and want to install the 2.2 leak but keep root
FROM A ROOTED PHONE (using ADB):
1. Run "adb shell"
2. Run "mount -o rw,remount /dev/block/system /system"
3. Run "mv /system/bin/su /system/xbin/su"
4. Copy the update.zip (download below) to your sdcard
5. Reboot into recovery (power down - hold volume down and home button and press the power button)
6. Run the update.zip that you downloaded
You can also do it using Root Explorer if you want.
I was meaning to update using the OTA from verizon. not the leaked version. I want to keep root but update to Froyo. How can i keep root? Or is that even possible with the OTA
You'll have to wait and see when the OTA hits. You'll most likely lose root and who knows if you'll be able to get it back right away. Have to wait and see.