I took a quick look at SpeedFan ( I have a JX), but it doesn't seem to work. Only detects one fan (the CPU one), its readings are way off (RPM was shown in the millions) and no visible way to change anything. I strongly suspect you won't be able to modify the fan tables, at least not with software. There may be some bios editing from enterprising people in the future, I don't know.
I wouldn't use speedfan, I was installing and about to the end, the laptop sorta crashed. ( I own a Asus G750Jm) Anyone know a easy, safe way to clean out the two fans?