You can export nearly every song from the Rock Band 2 song library to Rock Band 3. The export will cost you $9.99, but it’s well worth the cost in my opinion.
Note that if you purchased the license to copy your Rock Band 1 songs to Rock Band 2, those songs should automatically be imported into Rock Band 3 as well. Also, any downloaded song from either game should automatically be imported as well.
You’ll need your Rock Band 2 manual for all of these methods, so hopefully you keep them right? If you don’t have it, you’ll want to visit http://support.ea.com and they should be able to assist you with a new code.
You’ll also need about 2 gigs of free space on your hard drive.
How to export Rock Band 2 songs on Xbox 360:
1. Make sure you’re connected to Xbox Live
2. Select Get More Songs from the main menu in Rock Band 3
3. Select Redeem Code
4. Input the 16 digit code from the back of your Rock Band 2 manual
How to export Rock Band 2 songs on PS3:
1. Go to http://rockband.com/ps3-export
2. It will prompt you to enter the code from the back of your Rock Band 2 manual, so enter it here
3. The website will give you a new code, so make sure to write it down
4. Select Get More Songs from the main menu in Rock Band 3
5. Select Redeem Code
6. Input the code that you wrote down from the website
How to export Rock Band 2 songs on Wii:
1. Make sure you’re connected to the internet on your Wii
2. Select Get More Songs from the main menu in Rock Band 3
3. Select Redeem Code
4. Select Previously Redeemed Code
5. Select Rock Band 2 Export Pack for 1,000 wii points