Easy enough:
Step 1. Copy the following to the root of your SD card and name it update.zip (44.4MB)
http://bit.ly/beSwQm
Step 2. Reboot in to the recovery. Power+Trackball > Bootloader > Recovery
Step 3. Press Vol Up+Power
Step 4. Apply update.zip
Step 5. Enjoy
This does NOT wipe your phone, however, I would
HIGHLY suggest that you uninstall any Home Replacement apps or launchers
BEFORE you apply this update!! I know that HelixLauncher will loop your phone and a full WIPE will be needed to get it back.
Other than that, should be quick and easy update.