I absolutely know that. I have IDA Pro, Ultra Edit and WinOLS. I've dabbled in hex quite a bit. Did some Euro tuning for a little while long before HPtuners added Euro support. Locating the switches would be the easy part. Rewriting an operating system on an OE level is something completely different.
I'm not saying it can't be done although I do have doubts. I'm questioning the validity of it has been done by the person claiming to have done it.
I stand by my original comment that some people will believe anything because they read it on the net. Keep in mind I've been around at least as long as Jessie Bubb. I'll leave it at that.