Once again, thanks to everyone for all these greatly helpful and greatly appreciated replies. I am amazed at how good the HD 500 sounds now after the reset. I hope to get EFX loop fixed in my Mark I so I can run the HD 500 through the FX loop and see how the sound changes *not* going in through the front.
Tonight I'm going to try and do the pedal recalibration and try and get the on-board pedal to actuate. Then I'll work on the stereo set up and also plan to try and download the tones that GT Lazer linked me to, and try and figure out how to upload them into the HD 500; not sure how to do that.
I'm glad to be part of this forum; it's my first one, and I hope to be contributing soon, once I get to know the HD 500 better.
Just for the record: I ran the HD 500 into the front of the Coyote HG using an ABY, and then ran my dynacomp, Fuzz Factory, Box of Rock, Freeze, Carbon Copy, Space, and Timefactor, and RC 20 into the Boogie, and started looping and layering, simul-playing, and it was awesome. The HD 500 really does sound good, especially for the kind of tones I like which is usually really heavy rock and roll.
Cheers and more soon.