ClockworkMod (CWM) Recovery package
Keep the first two files on your PC. Transfer Superuser directly under /sdcard on your Skyrocket.
Step 2: Unzip ODIN’s .zip file using a suitable software and launch it by double-clicking on the .exe file.
Step 3: Shut down your Skyrocket. Now, press and hold Volume Up + Volume Down buttons while simultaneously connecting your device with your PC. When you see a Download Mode screen, leave the buttons.
This is a little tricky, but at least it’s not as tricky as, say, booting into DFU mode on iOS devices.
Step 4: ODIN will detect your device. If it doesn’t, either try Step 3 again or download the latest browsers for your device.
Step 5: Click on PDA and select SkyrocketCWMrecovery.tar (first file you downloaded in Step 1).
Step 6: Click Start.
ClockworkMod Recovery will now be flashed onto your device. Your device will reboot after ODIN is done.
Step 7: Shut down your device once again. Boot into ClockworkMod Recovery by pressing and holding Volume Up + Volume Down + Power. Don’t let go until you get to the main menu!
Step 8: Navigate to install zip from sdcard > choose zip from sdcard and select SuperUser 3.0.7 file that you downloaded and transferred to your device in Step 1.