[Droid Pro Android Development] raphael888:
OK, I succeeded.

My Droid Pro is upgraded from rooted 2.2.1 to 2.3.3.

Follow the standard method may lose the root status next reboot.

I've modified the bat file (Click to root your DROID 3.bat) bellow. (Refer to http://www.psouza4.com/droid3/, Thanks!)

Good luck!

@echo off
cls
adb kill-server > NUL
COLOR B0
TITLE DROID 3 Easy Root Script
cls
echo ***************************************************************************
echo * *
echo * DROID 3 Easy Root script v7 *
echo * *
echo ***************************************************************************
echo *
echo * Please make sure you meet these pre-requisites:
echo *
echo * (a) install the correct driver
echo * (b) turn on USB debugging (on your phone under Settings -^> Applications)
echo * (c) plug in your phone and set your USB mode to 'charging only'
echo *
echo * Note: your phone will reboot twice during this procedure. This is normal.
echo *
echo * READY TO ROOT YOUR DROID 3 WHEN YOU ARE!
echo *
COLOR E0
pause
echo *
echo * Waiting for your phone to be connected...
echo *
adb wait-for-device > NUL
COLOR B0
echo * Running exploit [part 1 of 3]...
adb kill-server > NUL
adb shell rm /data/local/12m.bak > NUL
adb shell mv /data/local/12m /data/local/12m.bak > NUL
adb shell ln -s /data /data/local/12m
adb reboot

echo *
echo * Rebooting the phone... please wait.

adb kill-server > NUL
COLOR E0
adb wait-for-device > NUL
adb wait-for-device > NUL
COLOR B0
echo *
echo * Running exploit [part 2 of 3]...
adb shell rm /data/local/12m
adb shell mv /data/local/12m.bak /data/local/12m
adb shell rm /data/local.prop.bak > NUL
adb shell mv /data/local.prop /data/local.prop.bak
adb shell echo "ro.sys.atvc_allow_netmon_usb=0" ^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_netmon_ih=0" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_res_core=0" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_res_panic=0" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_all_adb=1" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_all_core=0" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_efem=0" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_bp_log=0" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_ap_mot_log=0" ^>^> /data/local.prop
adb shell echo "ro.sys.atvc_allow_gki_log=0" ^>^> /data/local.prop
adb reboot

echo *
echo * Rebooting the phone... please wait.

adb kill-server > NUL
COLOR E0
adb wait-for-device > NUL
adb wait-for-device > NUL
COLOR B0
echo *
echo * Running exploit [part 3 of 3]...

[COLOR="Red"]adb shell mount -o remount,rw /dev/block/system /system
adb shell rm /system/bin/su
adb shell rm /system/xbin/su
adb shell rm /system/bin/busybox
adb shell rm /system/xbin/busybox[/COLOR]
adb push busybox /system/xbin/busybox
adb push su /system/xbin/su
adb push Superuser.apk /system/app/Superuser.apk
adb shell chmod 4755 /system/xbin/su
adb shell chmod 755 /system/xbin/busybox
adb shell chown system.system /data

echo *
echo * ALL DONE! YOUR PHONE SHOULD BE ROOTED!
echo *
echo ******************************************************************************
echo.
echo You may now close this window...
echo.
COLOR A0
adb kill-server > NUL
pause
TITLE Command Prompt
COLOR 07