Here's a link from the Technical Sub-Forum which is a list of remotes:
http://www.satelliteguys.us/attachment.php?attachmentid=7758&d=1142022830
Someone said the 6.2 and 6.3 are the same except for button colors, but I don't think the 6.0 would be a replacement for a 6.3.
You did not say what receiver you have, so here's what I know with the ViP622.
In Single Mode, either remote can control the ViP622, the TV1 Green IR Remote will only work in the same room as the 622, while the TV2 Blue UHF PRO Remote will work from upto 200 feet.
In Dual Mode, so that you can watch different programs on 2 TV's....
The TV1 Green IR remote will only operate TV1 from within the room.
TV2 Blue UHF PRO Remote will operate TV2 from 200 Feet, and you can program the AUX MODE to operate TV1 from within the same room as the 622.
If you were to get a 6.3 IR/UHF PRO Remote (or an earlier 6.2), you could then set up the 622 TV1 to work as a IR/UHF PRO receiver instead of IR only (shipped mode). This will allow you to control TV1 from upto 200 feet, provided it has the "Green tab, with a 1 on it, and UHF PRO etched on it.
So you could get another remote that comes with interchangable chips (Green-1 and a Blue-2), set it up to control TV2 in SAT MODE and control TV1 in AUX MODE while in the same room as the 622.
If you are not interested in switching channels on TV2, just seeing what the kids are watching, then....
Yes, you could feed TV2 out to a second input on your TV; or
If TV1 is connect to the INPUT 1 on your TV, then you could take the RF output of the 622 and feed the TV ANTENNA INPUT so that it could view TV1 and TV2 by just changing the channels. Hopefully the Dish remotes work with your TV, if so, then yes, select TV, then press Input until you get to Antenna or the correct Input, then select the channel up down.