No, she can possibly have the cost of her remaining days of ONE of her tickets put toward an AP. Policy is that only one ticket may be applied to any purchase of any one ticket. The cannot be done over the phone or online... it has to be done in person
Basically, she would need to take her tickets to Guest Relations. They will read them and find out how much is left on the tickets and what their worth would be. Then after finding out the worth of the ticket she may choose to apply the cost (basically the amount she paid for the ticket originally, divided by the number of days... then multiplied by the number of days she has left) of ONE of her tickets and that amount will be credited toward the purchase of her one AP.
Also, if her ticket has plusses on it, and any of the plusses have been used, she will have to upgrade her ticket to a PREMIUM ANNUAL PASS... all configurations have to match.
I know that this isn't the news she was hoping to hear, but unfortunately, it is Disney's policy for upgrading.