ADB, fastboot, flashing help?

I have a htc unrooted, s-on and usb debugging off. Doesnt let me in recovery only fastboot. I'm wondering; A) is it possible to use adb while usb debugging is off?(to turn usb debugging on or change settings etc.) If A) is not possible how could I turn usb debugging on as im locked out of phone? (Forgot pattern and password)

B) is there a way to run a script through stock recovery? (use a .zip script)

C) can you run a script through CWM recovery? And how?

Thanks in advance!