If you only renamed the install-recovery.sh file to install-recovery.sh.bak then you might be able to rename it back to the original and it MIGHT reinstall the stock recovery after rebooting a few times. Maybe then you can install the update. You can go to Settings. About Phone, and go to Software updates and try it then. After the update installs check if your still overclocked, and if not, reflash the kernel to check if it still works as well. Idk if it will due to it being for a different firmware. But then you can pull the original boot from a nandroid and have someone add the overclock and stuff tp it. And you should be able to install CWM again as well. :]