I've been playing for about a year now, and am an ok rythym player (metallica stuff mainly), but anything past the 12th fret is just god awful. The fade to black solo is extremely easy for my fretting hand but my pick just can't seem to be nearly fast enough. Yes, im alternate picking. Any tips to pick faster/better and to get both hands to work together?

which fade to black solo?
and it's just practice...took me a while to learn the ending solo
play it slow, practice, and gradually bring it up to speed. If you try and play it full speed first time around your probably going to play it really sloppy and have to go back and relearn it, so just take it slow and practice.
Current Gear:
Ibanez rg470
Peavey ValveKing 112
Blackheart little giant head
2 homemade 112 cabinets
Boss SD-1