Once you have that taken care of, navigate to where you downloaded CWM and the insecure boot image, extract the folder, and launch a command prompt (shift+ right click > open command window here; Note: this doesn't work in Windows 7's libraries - you must be in the actual folder). Once you've done that, execute the following commands with the device plugged into your PC:
adb reboot bootloader
fastboot flash recovery cwm-18.104.22.168-pororo.img
fasboot flash boot element-boot-insecure.img
After that, just install SU from the Play Store (or grab the flashable version from here and flash in CWM) and you're done. You now have a rooted tablet with ClockworkMod recovery!