LG DH4220S fat fingered EPROM change

Hello,

I followed the instructions here http://www.videohelp.com/dvdhacks/lg-dh4220s/12030 for making the DH4220S Region free but unfortunately I made a mistake and changed the wrong digit.

Instead of changing the number to the right of C, I changed the C instead!

Is there a way to enter letters using the remote? I haven't been able to find one. I can only enter numbers using the remote. Or can the EPROM be set back to original some other way?

Thanks heaps for any tips

Ben