I've got NC1. http://forum.xda-developers.com/show....php?t=2301724 says I need to be on NC5. I've never heard of NC5.
I've watched Youtube vids and read a couple different Safestrap threads and I can't seem to understand what is the PREFERRED METHOD of flashing this rom. Some people say to flash over the stock rom slot while others say you have to flash to rom slot-1 then restore to the stock slot. Some say to leave the stock slot alone.