When I tried to update to the latest Cyanogen build, it was laggy and nonresponsive as hell. I tried like 4 different times to get it functioning and got no where. So finally in the end, I backed my sd card up to my pc and formatted/repartitioned mt sd card and just put the 2 files needed for the update on the sd card. When I flashed this time, it was fast. VERY fast. from there I copied some of my files back over, but a lot of them were just old updates to previous builds I have used and a ton of themes. From there I started trying to port over a new theme. But in the end, I gave up since while everything on the theme was working correctly, it was causing FC's on some of my highly used google apps. (gmail and market) I am gonna work on another one tonight or possibly just start from scratch and build my own since I feel comfortable digging around in the files now.