Replace PAI with another number for specific phone number

Hello,

I have an AcmePacket 1100 and am wondering how I would go about replacing the PAI of a specific phone number to be a different number upon leaving the AcmePacket. I used to be able to manipulate outbound numbers using session translation, but apparently outbound calling now is displaying the number from the PAI so the session translation will no longer work for this purpose.

Thanks in advance for anyone who might have the answer!