It was a simple process but I didn't think of it at first because nobody on several forums had any idea and all I thought it would be was a simple "ah someone on a forum will know". So today I decided to called an airport and the lady there didn't know, so then I talked to one of the guys in the tower he wasn't sure but suggested I contact the NWS, the guy there wasn't sure but he said that it just started showing up after an update with the software on their ASOS. That answer gave me the extra piece of info that seems very simple in hind sight, all I had to do was search google for "ASOS I3000" (click the "Search only for ASOS I3000" link) and the first non-ad listing is a pdf from the NOAA about the new software and what the new groups mean, including the ice accretion one.

It goes to show that forums and the internet are great but sometimes you have to go a little beyond to find the answers.