Shredzilla,
I think you have this in the right place. Here's my 'metal' patch on the MP-2, it may not be exactly what you're looking for, but it'll give you a head start. I was trying to emulate the sound of my Mesa Boogie DC-5 combo (a single rectifier) with the trademark 'V' pattern on the EQ.
Keep in mind: the guitar, the pickups, the amp, the speakers, and the room, are all contributing factors to tone. There are more factors of course (mics, mic placement, tunings, strings, etc.) but I wanted to throw that out there. What works for me, may not work for you, and vice versa. I actually have this patch in several different variations for different guitars (I typically save a bank of 10 patches for each guitar - this one is for the Gibson Explorer w/PAF pickups).
Dante's Metal Patch:
Voicing: 5 (Warm Vintage)
Drive: 90
Master: 80
Compressor: OUT
Lo +6
Mid -2
Hi 0
Pres +6
EQ
100 = +12
170 = +6
280 = +12
470 = -6
800 = -12
1.3 = -4
2.2 = +10
3.8 = +2
6.3 = +4
Noise Gate: In
Threshold: 50
Chorus: OUT
F/X Loop: OUT (switchable via Quad switch)
Ch A: 60%
Ch B: 40%