Tuner settings I can help you with.

As you get closer and closer to the end, there's a breadcrumb for tuner settings for G68 (or G91 in my case). You will have an option on that screen to Save settings or Load Settings. I think the file extension is .mst.

I believe that MRC data is stored within the MSL files these days, but I could be mistaken.

Surround Music Fan/Computer Geek/Curmudgeon in training.
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861v4, HD621, Panasonic BD-P55K, Toshiba HD-A35, Oppo HD990, Dish Network 622, Pioneer DV-668AV-S w/ DVD Upgrades mod, EW Fontaine II (x5), Velodyne DD-15 (x2), Seymour AV Ice blocks (x7)