FireWall-1 address translation

[MAURO_STARINIERI @ HP-Italy-om1 . om . hp . com]

Item Subject: Text_1
     
     I have to connect, in a secure way using FireWall-1 V2.0, an internal 
     network to more than one external networks. Some of these networks 
     have the same IP address (they are not public networks), so, when I 
     will connect them to the same network, I have the problem to manage 
     correctly these duplicated addresses. I know that with FW-1 it is 
     possible to translate internal invalid addresses to valid addresses, 
     but what I have to do is the contrary: translating external invalid 
     addresses to valid ("unique") addresses. 
     Could anyone suggest me a way to do that using FW-1?
     
     Thanks a lot in advance,
     Mauro Starinieri