I think you're a little confused.
MPEG4 conversion is for HD only. So an R15 isn't going to help you there.
But anyway, Sunday Ticket, both HD and SD, should still be MPEG2 this year. There really isn't enough time to do otherwise as the new sat won't be ready in time for the start of the season. But I'll just add that you never know. But there really isn't enough time to do it this year and get everyone new receivers.
In 2008 it's expected that Sunday Ticket HD games will be in MPEG4 only, but the SD games will still be in MPEG2, there is no SD conversion going on. So your HR10 will still get SD games for the forseable future. But you'll need an MPEG4 receiver (H20 or HR20) for the HD games next year.
But anyway, Sunday Ticket, both HD and SD, should still be MPEG2 this year. There really isn't enough time to do otherwise as the new sat won't be ready in time for the start of the season. But I'll just add that you never know. But there really isn't enough time to do it this year and get everyone new receivers.
In 2008 it's expected that Sunday Ticket HD games will be in MPEG4 only, but the SD games will still be in MPEG2, there is no SD conversion going on. So your HR10 will still get SD games for the forseable future. But you'll need an MPEG4 receiver (H20 or HR20) for the HD games next year.