Edit: As of 17:36 GMT, the level pack 1 is no longer available on Ovi Store.
Angry Birds Levelpack 1 is now on the OVI Store: http://store.ovi.com/content/23857
Installation instructions:If you have the latest firmware (3.2010.02-8):
Download the package to your phone. Click the downloaded file, and App Manager will take care of the rest. Easy peasy!If you have an older firmware, you must install the downloaded debian package from the terminal as root, using the command dpkg -i angrybirds-levelpack1_1_0_0_armel.deb