Currently, I'm on AT200 w/silver HD. In about a week and a half, there's a game I'd like to see that's going to be on Versus, which is in AT250. Is it possible to add the one channel or AT250 for a short period of time (such as over the weekend)? If so, what kind of expenses would I be looking at? Would it be a prorated amount of the difference in packages? Would I have to pay the downgrade fee when I went back to AT200? Any input you have would be appreciated.