Hello Francis,
Well as it has been mentioned so many times the ASA does not support PBR but if you configure the right static routing and the right NAT commands you will be able to send some traffic via Differents ISP.
What version are you running and what specifically are you trying to send over each link?
Rate all of the helpful posts!!!
Regards,
Jcarvaja
Follow me on http://laguiadelnetworking.com
Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC