[Serusers] load balancing amongst servers

First of all thanks for the response and support ... really appreciate that ... This time the problem is alittle more complex now coming to the point I really need to know how can i do load balancing for a situation like

[SER1] DIALER ----------------> [SER2] --------> PSTN [SER3]

I have 3 SER servers and i want some kind of load balancing amongst them. I have been trying to make SER work behind a load balancer but that seriously involves mangling with some headers. So, is there any clean way to get this done ... Please help me in this as i am pretty struck at this point...

regards, Zeeshan.

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