[Verizon Droid Incredible 2] ra1eigh:
So I'm using the guide from Android Forums to downgrade from 2.3.4 to 2.3.3. I've been following all of the directions and the final .cmd script appears to be running fine, but when it ends up rebooting, I'm always running 2.3.4. I've tried it on two different computers and it still doesn't work. I can't post outside links, but I'll post the actual code that is running in the command window. I have all my drivers installed correctly (according to my Device Manager on Windows 7), and my phone has USB debugging, Fast boot off, and Charge only on.

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Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Windows\system32>cd \

C:\>cd Android

C:\Android>adb devices
List of devices attached
HT1BGMA10912 device

C:\Android>hack-vivow.cmd

C:\Android>if /I NOT EXIST C:\Windows\adb.exe copy tools\win\adb.exe C:\Windows

C:\Android>if /I NOT EXIST C:\Windows\AdbWinApi.dll copy tools\win\AdbWinApi.dll
C:\Windows

C:\Android>if /I NOT EXIST C:\Windows\AdbWinUsbApi.dll copy tools\win\AdbWinUsbA
pi.dll C:\Windows

C:\Android>if /I NOT EXIST C:\Windows\fastboot.exe copy tools\win\fastboot.exe C
:\Windows

C:\Android>if /I NOT EXIST C:\Windows\sleep.exe copy tools\win\sleep.exe C:\Wind
ows

C:\Android>adb shell rm -r /data/local/tmp/*

C:\Android>adb push zergRush /data/local/tmp/zergRush
1218 KB/s (21215 bytes in 0.017s)

C:\Android>adb push misc_version /data/local/tmp/misc_version
1546 KB/s (15837 bytes in 0.010s)

C:\Android>adb shell chmod 777 /data/local/tmp/zergRush

C:\Android>adb shell chmod 777 /data/local/tmp/misc_version

C:\Android>adb shell /data/local/tmp/zergRush

[**] Zerg rush - Android 2.2/2.3 local root
[**] (C) 2011 Revolutionary. All rights reserved.

[**] Parts of code from Gingerbreak, (C) 2010-2011 The Android Exploid Crew.

[+] Found a GingerBread ! 0x00017118
[*] Scooting ...
[*] Sending 149 zerglings ...
[*] Sending 189 zerglings ...
[-] Hellions with BLUE flames !

C:\Android>echo Sleeping 10 secs while adb restarts on the device....
Sleeping 10 secs while adb restarts on the device....

C:\Android>sleep 10

C:\Android>adb shell /data/local/tmp/sh -c '/data/local/tmp/misc_version -s 2.18
.605.3'
/data/local/tmp/sh: permission denied

C:\Android>adb reboot bootloader

C:\Android>fastboot oem rebootRUU
< waiting for device >
... OKAY [ 0.356s]
finished. total time: 0.356s

C:\Android>fastboot erase cache
< waiting for device >
erasing 'cache'... OKAY [ 0.888s]
finished. total time: 0.891s

C:\Android>fastboot flash zip RUU_Vivo_W_Gingerbread_S_VERIZON_WWE_2.18.605.3_Ra
dio_1.09.01.0622_NV_VZW1.92_release_199487_signed.zip
sending 'zip' (292817 KB)... OKAY [ 52.023s]
writing 'zip'... INFOadopting the signature contained in this i
mage...
INFOsignature checking...
INFOzip header checking...
INFOzip info parsing...
INFOchecking model ID...
INFOchecking custom ID...
INFOchecking main version...
FAILED (remote: 43 main version check fail)
finished. total time: 97.349s

C:\Android>fastboot reboot
rebooting...
finished. total time: 0.159s
C:\Android>hack-vivow.cmd

C:\Android>if /I NOT EXIST C:\Windows\adb.exe copy tools\win\adb.exe C:\Windows

C:\Android>if /I NOT EXIST C:\Windows\AdbWinApi.dll copy tools\win\AdbWinApi.dll
C:\Windows

C:\Android>if /I NOT EXIST C:\Windows\AdbWinUsbApi.dll copy tools\win\AdbWinUsbA
pi.dll C:\Windows

C:\Android>if /I NOT EXIST C:\Windows\fastboot.exe copy tools\win\fastboot.exe C
:\Windows

C:\Android>if /I NOT EXIST C:\Windows\sleep.exe copy tools\win\sleep.exe C:\Wind
ows

C:\Android>adb shell rm -r /data/local/tmp/*

C:\Android>adb push zergRush /data/local/tmp/zergRush
1726 KB/s (21215 bytes in 0.012s)

C:\Android>adb push misc_version /data/local/tmp/misc_version
1718 KB/s (15837 bytes in 0.009s)

C:\Android>adb shell chmod 777 /data/local/tmp/zergRush

C:\Android>adb shell chmod 777 /data/local/tmp/misc_version

C:\Android>adb shell /data/local/tmp/zergRush

[**] Zerg rush - Android 2.2/2.3 local root
[**] (C) 2011 Revolutionary. All rights reserved.

[**] Parts of code from Gingerbreak, (C) 2010-2011 The Android Exploid Crew.

[+] Found a GingerBread ! 0x00017118
[*] Scooting ...
[*] Sending 149 zerglings ...
[*] Sending 189 zerglings ...
[-] Hellions with BLUE flames !

C:\Android>echo Sleeping 10 secs while adb restarts on the device....
Sleeping 10 secs while adb restarts on the device....

C:\Android>sleep 10

C:\Android>adb shell /data/local/tmp/sh -c '/data/local/tmp/misc_version -s 2.18
.605.3'
/data/local/tmp/sh: permission denied

C:\Android>adb reboot bootloader

C:\Android>fastboot oem rebootRUU
< waiting for device >
... OKAY [ 0.297s]
finished. total time: 0.297s

C:\Android>fastboot erase cache
< waiting for device >
erasing 'cache'... OKAY [ 1.024s]
finished. total time: 1.024s

C:\Android>fastboot flash zip RUU_Vivo_W_Gingerbread_S_VERIZON_WWE_2.18.605.3_Ra
dio_1.09.01.0622_NV_VZW1.92_release_199487_signed.zip
sending 'zip' (292817 KB)... OKAY [ 48.610s]
writing 'zip'... INFOadopting the signature contained in this i
mage...
INFOsignature checking...
INFOzip header checking...
INFOzip info parsing...
INFOchecking model ID...
INFOchecking custom ID...
INFOchecking main version...
FAILED (remote: 43 main version check fail)
finished. total time: 103.258s

C:\Android>fastboot reboot
rebooting...
finished. total time: 0.180s
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