BR-600 Amp micing ?s

[Highside]

Hello guys, my first post, but been lurking awhile. Tons of great info here and it's opened my eyes to many of the details of recording. I'm just starting really simple to experiment and see how far I want to go, so I'm sure this may seem remedial for you high tech guys

I recently bought a BR-600 and a Shure SM-57 Mic (what else?) for recording guitar with some drum backtracks. Not making a demo, I'm more interested in recording my ideas with multiple guitar tracks. I would at least like the quality to be good enough to share with friends at a minimum.

I've been experimenting for a week now and have the basic functions down. I've been experimenting with the SM-57 and am happy with the results recording acoustic guitar and clean electric. Even blues break-up type distortion is good, but I'm really having trouble capturing high gain/heavy metal type of stuff. The real killer is anytime I do some palm muted rhythm on the guitar. I've tried all kinds of mic placement, amp level,recording level, and mic sensitivity and the bass tone on the palm mutes always comes out either distorted and/or very overpowering. I've tried cutting back the bass on the amp and it helped a little, but the only way I could get a recordable sound was to cut the bass on the track EQ to the point where I was left with a fizzy, thin guitar sound (terrible).

I'm willing to try any suggestions and have a feeling I must be doing somthing wrong that's very basic, but I'm not sure what to try next . Really I'm not just nitpicking the sound here either as I don't expect an album worthy recording with my equipment, but I hear guitar demos on YouTube with a DVR camera that sound better than what I'm getting. Help!

[Highside]

C'mon, someones got to at least have an idea, don't force me to start direct recording (that should get a rise out of some of you)