Our band uses Songbook BB instead of the original Songbook. SongbookBB has some nice features, such as the ability to tell you what parts people have synced, and it warns you if you select a part that is different from the instrument that you currently have equipped.
You can install the new songbook along side the current songbook, so that both are available for you to use. Bau has kindly put together some files and instructions that make installing it easy, and I've put those files in this dropbox folder.
Just one small note about Bau's instructions .. they assume that you are using the Plugin Manager. If you are NOT using the Plugin Manager, you can still use Bau's instructions with a slight modification: where his instructions say "From the plugins manager, choose SongBookBB" what need to do instead is to run the following commands from the chat window:
/plugins load songbookBB
You only need to do /plugins refresh once (not every time you use the songbookBB) -- this command tells LOTRO that you now have a new plugin on your machine that's available to use.