Configuring 4255 sensor in promiscuous mode

I have a 4255 with 3 interfaces that connect to a 6500 series switch. The IPS interfaces are set to promiscuous mode with a defualt vlan specified.
On the switch side, I would like to send the traffic from more than one vlan to the sensor GE interfaces. What is the best way to do this?
Do I set up a monitor session on the switch with a source of multiple vlans, then set the destination as one of the sensor ports?
I also see the option to do a switchport capture.
Any advice would be great

You want to do a VACL capture on the 6500:
http://www.cisco.com/c/en/us/support/docs/lan-switching/vlan-access-lists-vacls/89962-vacl-capture.html
monitor session 50 source vlan 100 , 200
monitor session 50 destination interface Fa3/30

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