They look fine. You probably can't tell them from the PS2's unless you look closely. They're probably better than the PS2's in the snow, but they're not snow tires.
I have the Conti ASP's but I don't plan on driving my Xfire in the snow. If I did, I'd go out and buy real snow tires and rims and change them over in the winter. I think you'll find that there are a few Xfire owners that do that.