There is another option available for you which is even better than the Pulsar and Helix update.zip. It is a bit more complicated but works wonders. Flash with 2.1 via RSD Lite, flash with the vulnerable recovery, root, flash the patched boot.img to get rid of the Alarm and Music bug, install Root Explorer and strip your device of the system apps you don't use or need (leave the launcher.apk for now and move all others to a safe folder on your SD card for backup), go to the market and install Helix Launcher or Home++ (whichever you like best), after choosing one of those home replacements as your default, move the Launcher.apk from the system/app folder on your device to a folder on your SD card (for backup). Reboot the device one final time and you have a very nippy device.