BuddyPress.org

Hello I have few issues that I hope can get help with:

1. How can i do that only with one email domain people would register? I want to make registration available only to my university students email., Thats all what i want. i found plugins for wordpress registration ( whitelist) but they dont work with buddypress and it still posible to register with any email. I found buddypress premium plugin for this, but I dont have 30 $ to pay for it so I hope that there can be an easier way maybe some code that i would need to put cause all i want is just registration with one email domain thats all.

2. what file do i need to edit if i want to edit text on create acount (register) page where they say “Registering for this site is easy, just fill in the fields below and we’ll get a new account set up for you in no time.” i want to edit this text.

thanks for any help in advance