where can i find the helena beat demo?

It should be available to load under Help > Exploring Logic Pro Demo Project if you have the app store download version (Logic Studio on disks had a different content, such as the Lily Allen song, I believe).

Hi

If you purchased Logic Pro 9 from the Appstore, the Helena Beat demo content is included in the "Core Content" download. It will be placed in:

Library:Application Support:Logic:Logic Pro Demo Songs

CCT