How to pass test data dynamically changing soap input parameters

Hi Team,

I am trying to develop web services scripting in vugen but here i want to  pass test data dynamically as soap input parameters are changing like as below,bze at a time on POS WE CAN SWIPE MULTIPLE CARDS all cards values are going under this reqs input parameter as below examples.How can i work with this type of requests in virtual user generator scripts.

Single Request:

<ReqDtls>
<vReqs>
<amount>1.00</amount>
<cardNo>8897654778999</cardNo>
</Reqs>
<cardType>caredit</cardType>
</ReqDtls>

Multiple Requests:

<ReqDtls>
<vReqs>
<amount>1.00</amount>
<cardNo>8897654778999</cardNo>
</Reqs>
<vReqs>
<amount>2.00</amount>
<cardNo>890897654778999</cardNo>
</Reqs>
<cardType>caredit</cardType>
</ReqDtls>