I had one of those a few months ago but mine had issues
http://www.satelliteguys.us/4dtv-discussion/185440-got-dsr-4200-today.html
you have to program everything in and it only held one transponder in it
Actually, the limitation you refer to is that it only holds one VCT (virtual channel table), not that it only holds one transponder. When I first got my 4200, I think there were about 5 or 6 regular PBS transponders, a GPTV transponder, a LPTV transponder, and 2 SCETV transponders, all on the two nearby sats, T4 and GE3, and I THINK they were all on one VCT, although it may have been two VCTs. I have it written down somewhere. Later, things got separated a bit, and GPTV and SCETV and LPTV were on one VCT, the 5 or 6 PBS on another, and later T4 died, and SCETV moved to T14, but there were always at least 5 PBS transponders on that main VCT. Another more recent example is the NET channels on G28. Up until very recently, when their DVB service took the place of one of their DCII transponders, you could receive both NET transponders on one VCT. Also, those HITs transponders that used to be on G7 (I think), were all on one VCT, and that was like 12 different transponders, and not only that, the VCT would also work on the C-band hits channels up on C3.
The thing is that with the 4200, you tune in a VCT by locking on one transponder, but after the VCT is loaded, when you change channels, often the receiver is changing to other transponders.
But yes, now, at least most DCII signals that a 4200 can pick up are on VCTs that only cover one transponder, but I think there are still a few multiple ones. I forget what sat the HITS things went to, but I'd bet there were still multiple transponders on the single VCT. But the one VCT limitation is one reason that I stopped using the 4200. It was just too much trouble to switch from one VCT to another. I think I counted something like 50+ keystrokes and a wait of several minutes to tune in a new VCT.
Some of the more modern commercial DCII receivers that hold more than one VCT have a disadvantage though, and that is that it may be necessary to know the VCT number in order to tune in channels, whereas the 4200 automatically loads the VCT and loads the channels when you tune one of the transponders in the VCT. So I guess there are good points and bad points about holding only one VCT. Also, the 4DTVs, that don't even use a VCT, are dependent on channel maps that are uploaded via sat, and I'm not sure what is going to happen when those subscription services come to an end. It's possible that the 4200s will still be used, but the 4DTVs will be boat anchors.