I had to do this on friday, I had boot strap loaded. Unloaded it and installed Safestrap. Safestrap gave me an error during install. So I uninstalled it and reinstalled Boot Strap. When my D3 rebooted it sat at the M logo screen for 20 min and did nothing. I tried everything to get it back and ended up following the RootzWiki link and it worked perfectly. Just remember to be patient, because the first boot after the SBF install can take 5-10 minutes. After it was back I rerooted and then put safestrap on and made a complete backup. So now I am back to normal.