What you need to do is this:
Step 1: Download the Android SDK from
Android SDK | Android Developers The Windows file is called android-sdk_r4-windows.zip. Extract the files to your C: drive so that you now have the folder C:\android-sdk-windows
Step 6: Open a command prompt by clicking the Start button and typing cmd into the search box and pressing enter or found under All Programs>Accessories.
Step 7: You will now enter a series of commands which I will place inside code boxes to indicate the entire command. You may copy and then paste them into the command prompt window by right clicking.
Only enter one command at a time.
1:
Code:
cd C:\android-sdk-windows\tools
2:
If you've been following this guide you will see your phone's serial number. If you get "device not found" error, you either need to make sure you the drivers were properly installed or make sure you enable USB debugging AFTER you connect the USB cable. Continue on once you get the proper phone serial output.
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If you have the 1.5.2 Recovery Img on your SD card already, you can then do the following:
Code:
flash_image recovery recovery-RA-heroc-v1.5.2.img
FLASHING TO THE RECOVERY TAKES SEVERAL SECONDS-- BE PATIENT. ENTER THE NEXT COMMAND ONLY AFTER THE COMMAND PROMPT RETURNS TO THE # (ROOT SYMBOL).
Step 8: This is the last command; you may now close the cmd prompt. This will cause your phone to boot into recovery mode; it should take no longer than 30 secs. The third option on the list is "- Backup/Restore"; select it. Now, select the first option "- Nand backup". The phone will prompt you to press HOME to confirm which is want you want to do. The backup will begin. You will see the screen say, "Performing backup : .........." When done, the bottom of the screen will say "Backup complete!" and you will be given the menu options again. Go back to the main menu and select reboot system.
Rebooting your phone after installing the new recovery image may take several minutes.
Step 9: Once your phone is fully booted, mount the sdcard. You will see a folder called "nandroid"; I highly recommend you copy this to your pc in case you lose your sdcard data or reformat it. Your phone is rooted, 100% backed up, and ready to install a custom rom if you wish!