[Serusers] modify the From header

[Zeeshan Sajid]

Is there any way in which i can rewrite the From header efficiently

like i want to change this From header 
From: "Zeeshan"<sip:shani at localhost.localdomain>;tag=4a6dec6f
 to
From: "Zeeshan"<sip:shani at 128.242.111.222:5060>;tag=4a6dec6f
  
how can i do that using subst  function ???? please help me thanks in advance
regards

Zeeshan
 
 
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