BuddyPress.org

I am using buddypress register , It works fine. But I want to know some more information. User should get email with the following message after registering.
Hi Clara,
________________________________________

Thanks for registering!

To complete the activation of your account, go to the following link: http://fashionliberation.dk/activate/C1yspxMuJvOifkLhcMKC8G2tIPmc00vd/

I would like to add / edit some more text. May I know which path/file. I searched many files I did not get. Please help me.