Had to import Birthdays from yahoo calendar. Is there any way to move them to the iCal Birthdays calendar without manually inputing them each into Address Book?

I used to use Yahoo Calendar to manage my birthdays and notifications of them. Yahoo screwed with something, so now I no longer get birthday notification texts to my cell. Now, I've imported my Yahoo Calendar dates in to iCal. iCal has a Birthdays "subscription" calendar which only shows birthdays entered into the Address Book. I do not have any birthdays entered into Address Book. Is there any way to select birthday entries from my other calendars and move them to the birthdays tab, or must I manually enter over 200 birthdays into Address Book?

While I'm here, is there any way to highlight specific calendar entries and move them to a "new calendar"?

THanks in advance for any and all help.

-BKTru