Not a full answer and no pictures, because I didn't lower mine much, but if you were to lower it severely and want it to still sort of work:
1) Adjustable rear upper control arms are necessary to correct the pinion angle
2) Adjustable front upper arms (SPC sells them) are necessary because you can't get enough shims in the stock setup or the popular aftermarkets arms (Rideteck/UMI/Speedtech) to fix the alignment if you really slam it
3) If you want it not to bottom out all the time, the spring rates are going to need to be REALLY high. Like 800-1000 lb/in in the front, and 350+ in the back.
Take care with shock selection, too. You need a shock with a stroke that works in the range of motion you're going to end up with and the spring rates you'll need. I never got past the first three points before ruling out lowering mine, so I have no idea where to look for the right shocks. But I do know Bilstein's motorsports division will revalve a set of their shocks for something like $200 each, so it's doable.