Hi,
If you can run the test automatically, one simple option would be to start the DevTest Recorder, point the SOAP UI Request to recorder's host+port and let DevTest to capture and preocess the request/response pairs. I suggest to store the conversation in a Raw Traffic File in order to reuse it later on.
By doing this, you will have the SOAP UI information in a DevTest readeable format that allows you to repeat the VS creation process each time you need it.
Using DevTest to create the SV (Recording, RR Pairs, importing raw traffic file, etc) let you to improve the behavior by adding some DPHs after recording. It increases VS intelligence.