I am able to boot into CWM but it is not performing functions like backup,restore,mount,system,etc.
But you can download the attached zip place it in the root of your SD-CARD and flash it from recovery.
After you flashit with stock recovery, it will automatically OPEN CWM recovery.
You can scroll with volume buttons and center button to select and power button to go back.
But after reboot it will when you press power+volume up+centre it will boot in stock samsung recovery.
After you flash it you can also use ROM MANAGER and press Reboot into Recovery to boot in CWM Recovery.
It will not hurt your phone but i am not responsible for any harm to your phone.
Any help is appreciated.
EDIT: My recovery is not working. Use this recovery by Skin1980: www.multiupload.com/IGKG2L5RAF