irule to change source port

@nitass, I know how to do asymmetric routing part (thanks to you :-). It is of course based on two VSs, one per cluster. I am struggling with part related to outgoing VS iRule. Form your answer it seems that isted of configuring SNAT using VS options I should do it in iRule using SNAT command. I am not yet to fluent is this part so if you can post some iRule for that I will appreciate it a lot. I doubt there will be problem with port already used as this is answer to client call so tuples should be different.

Piotr