[SOLVED] send comment notification to custom field value (email)

Hi, im trying to figure this:

I use post by email to let users email new posts. This works like a charm and it adds their data (like name, age, gender, email, country etc) to custom fields.

But wordpress assigns the administrator as post author. So when someone comments a post sen by email, only the administrator get an email,

what i need is that the notification is also send to the custom field value "email".

I found this post,

http://wordpress.org/support/topic/c...3#post-2626973

but its an old post and no explnation is given. I asked advice and they said it should be doable in the theme's comment functions.

So can anyone advice me on how to edit the comments.php to include this custom email address in the notification email?