If you do a MR you will loose all the extra channels and satellites you use to be able to download on G1-3. Motorola stopped support on that in Jan. That is why I assembled the Map Master team, we have been working on a way for people to restore there IRD's after a MR. It can be done and works. The only thing is that Map Master has not been released yet to the public. We are working as fast as we can to get rollout to the public.
For now if you do a MR you can load the H2H, X4 maps and subscribe to the 410 packs. Once MM is released you will be able to get back maps better than Motorola ever gave in your 4D.
Only the map master team members can totally recover to pre Jan condition today from a MR. I would love for everyone to be able to do this today but until the software is finalized I can't release it.
My suggestion is this if you want to sub today. Do the MR load the X4 maps and when MM is released restore what you loose today. Motorola abandoned us that is why we had to do something ourselves and we did by creating Map Master.
If you do a MR today put your dish on X4 do a MR than store in G9, at X4 position, go to tr 13 or 11 and get a DC2 lock light. Let the receiver sit for 30 min. Then program in X4 and follow the 4 step process on my site. Then program your receiver with the stock 21 tiles if you wish.