The registration will open at random times - meaning no one, not even the admins, will know when it'll open again.
The reason for this you can read about here: \\Slowing Things Down// (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=27243.0)
Your friend will just have to have some patience and keep visiting the FeralHeart forum until the registrations open again.
Good luck~
Cheers~ // Shallow