How to uninstall cyanogenmod 7 :(

I have the HTC Hero (sprint) I want to uninstall the cyanogemod from my phone :/
so today i was just curious about how the cyanogemod would work but i installed to my htc hero (sprint) and all its different how can i uninstall the cyanogemod 7 from my htc hero :S..
So someone told downloading "HTC android phone ROM update Utility 1.0.2.10"
and i did but at first there was a message about my usb an error, now its not the usb, now this message appeae ""ERROR [140]: BOOTLOADER VERSION ERROR the ROM update utility cannot update your android phone. Please get the correct ROM update utility and try again"
I need help, i want to cry i want my phone back