ok i got passed that
i tried using RUU and it would not work said it wouldnt upgrade. didnt give me an option to downgrade. so i tried using the PG06IMG.zip method
once i copied it to the sd card on the phone i typed adb reboot recovery and unplugged the device an the screen went blank. phone restarted an i got an image of a phone with a red triangle waited about 20 mins. nothing happend so i pulld battery and im back to square one still at 2.3.3
After you temp root you have to push the misc.img, this will exploit the hboot and allow the downgrade. Once you've done that boot into hboot by powering down the device, then hold power and volume down until it boots into bootloader. If you put the PG06IMG.zip on the root of your SDcard, it should do a couple of checks then ask if you want to update. If you get into hboot and you have the zip on your sd card and your getting 'no image wrong image' and it never gives the option to update then your sd card needs to be formatted to fat32 (this will erase everything on the sd so be sure and back it up) Or you can run the RUU exe from your pc.
The red triangle that your talking about is the stock recovery, there's no need to try and go into recovery until after you have successfully rooted and flashed a custom recovery.
From what you described it sounds like you didn't successfully push the misc.img.. That has to be done in order to downgrade back to froyo