includes/cron/birthday.php hook?

[lemarvelous]

I have a little script that generates a coupon for users celebrating birthdays. I think it's best to convert it to a plug-in, but I don't see a relevant hook to pull everything together. It needs to run for each user, so I think the hook should be within the loop in birthday.php that sends out each e-mail.

Can I just create a custom hook? Pardon me for asking, but I can't find where this is possible. From what I've read, it looks like I have to request a hook at vbulletin.com for inclusion in a later version. Hopefully, I'm wrong!

Thanks for your guidance,

Jen