Configuring QoS on Powerconnect 5448 and 5324 for IP Phones

I need a little help here. I need to configure 2 - PowerConnect 5324 and 1 - PowerConnect 5448 switches to give priority to the 40 Polycom IP 335 phones on my network. I am pretty sure this can be do in the QoS configuration settings. Here are my settings under the QoS Global Parameters:

QoS Setting: Quality of Service - Enable and Trust Mode - CoS

Interface Settings: Interface Ports is selected, Disable "Trust" Mode on Interface is unchecked, Set Default CoS For Incoming Traffic is defaulted to 0 on all ports

Queue Settings: Queue 1,2,3 and 4 are all Strict Priority,(Queue 2 is greyed out and unchangeable)

CoS to Queue: Class of Service 0 - Queue 2, Class of Service 1 - Queue 1, Class of Service 2 - Queue 1, Class of Service 3 - Queue 2, Class of Service 4 -    

                         Queue 3, Class of Service 5- Queue 3, Class of Service 6 - Queue 4, Class of Service 7- Queue 4

DSCP to Queue: This appears to be fairly evenly distributed between the 63 DSCP in and the 4 queues.

I guess I am not sure what to set the Interface ports to and the CoS to Queue? Someone said "just set all the interface ports to CoS 5 for phone traffic"

Any help or direction is appreciated greatly.