If you want to look for a thread discussing "maps" do a search from search tab. But, I think you have maps mixed up with the satellite descriptors. The 4DTV uses old obsolete descriptors (names) that can be used for current satellite tiles. Such as X4 or W5 for real satellite AMC18/15 which is at 105W. The 4DTV only has ability to display one letter and one number. Motorola was not interested in updating the old names, and since most folks are familiar with them, I see no point in it either.
The "MAPS" comprise of several tables that tell the 4DTV how to tune to a specific virtual channel on a specific transponder on a specific satellite and such data as polarity, FEC, SR, etc
There are a lot of DCII services that Motorola decided not to include in the "MAPS" so basically they have left out that channel's data from the VCT.
You do not need to worry with maps unless you want to add missing channels, etc via MapMaster, etc. Most satellites do not have any DCII channels (P3, P1, etc) P9 (58W) does have several services however, only DMX audio is "mapped" in... So it is all you will "see" when you go to P9.
If you just want to sub with HITS, as long as you have X4 (c-band) mapped in (which means it shows in your satellite list - it is in your satellite table in the maps) you need to reset EMM to 0 if it is still set to 4096. First, verify DCII lock on X4. Then, Options 6-7-7-8-0 while on X4, EMM Provider=0, then buy package you want and hit box from websams. EMM should then update to 4160. Good luck, and if you have question regarding a specific satellite, post here and I'll try to answer it.
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The satellites in blue above have DCII services on them, such as C4, it is the 4DTV name for real satellite "AMC10" at 135W.