I'm going to give the BIOS flash a go in the next week or so, so I'll report back with my results. The guy that was having problems with it didn't quite sound like he knew what he was doing. Misty reported success and I'm confident that the guys that packaged the files know what they are doing. Nevertheless, I'll cross my fingers and hope I don't brick my beloved NC20.
Samsung NC20 BIOS Mod Works This technique definitely worked for me. Like Misty, I used the Dell version of the bios. I flashed it using Plash17 on a bootable USB thumb drive. I opted to use the /bu (backup) option with Plash17, in addition to the rest of parameters provided in the instructions. After flashing the BIOS and then installing Win 7 RTM, I followed the instructions for loading the cert and activating. It worked like a charm! See pictures attached. P.S. Don't worry about grabbing any specific BIOS version from the Samsung website. Everything you will need is included in the SAMSUNG_NC20-Samsung-09MQ.rar file (literally everything).