Ok, so I've decided to root my G1. I've also decided that I would use the one-click method, and flash Cyanogen recovery. Now I must downgrade from what I am running (1.6 Donut) to 1.5 Cupcake for the flash to work. Small problem though... When I boot in recovery mode, and press Alt+S to apply update.zip from sdcard, it begins to install, then it stops and says 'Installation Aborted'. I've been told it was because I have not formatted my sdcard to FAT32, but I have, and it still says 'Installation Aborted'. What could I possibly be doing wrong?