Will, we do not know what receiver you are running. Each bin file for each receiver is different from the rest. Example, you can only run a VS Platinum bin in a VS platinum receiver. One bin file will be good for both DN and Bev. You cannot run dual bins and you don't need to. I would suggest going to a good fta site to read up a bit. There are some really informative sites out there. I use Cyberdss.com, but have heard good things about dsscomunity.com and al7bar.tc.
Will the last megasat file I have seen is the 278T, but that was released in September. You mabe able to watch tv with it, if it has this latest file and the autoroll is on. I have had very little experience with megasat, so visiting and posting your question on any of the sites mentioned earlier will help a lot.