Create Property Transfer and set up Transfer Values in a groovy script

Here's a groovy script that can be easily modified to fit what you want, I think.

import com.eviware.soapui.impl.wsdl.teststeps.registry.PropertyTransfersStepFactory

// Define test case to work with. This assumes the same test case the groovy script is in.
def tc = context.testCase;

// Define TestStep name for PropertyTransfer test step.
def tsName = "TestStep Name"

// Create test step in the test case using tsName as the name.
tc.addTestStep( PropertyTransfersStepFactory.TRANSFER_TYPE, tsName )

// Retrieve the test step created.
def testStep = tc.getTestStepByName(tsName);

// Set the transfer name.
def transferName = "TransferName";

// Add the transfer using transferName provided.
testStep.addTransfer(transferName);

// Retrieve the transfer created
def transfer = testStep.getTransferByName(transferName);

// Set the source test step name. This must be an existing test step in the same test case as the groovy script.
transfer.setSourceStepName("LMDataStore - Missing Element - 230");

// Set the Property for the source to Response.
transfer.setSourcePropertyName("Response");

// Set the Source Path language as Xpath
transfer.setSourcePathLanguage(com.eviware.soapui.impl.wsdl.teststeps.PathLanguage["XPATH"]);

// Fill in the XPATH statement. May be able to fill this in with GetData, depending.
transfer.setSourcePath("""declare namespace ns2='http://mobilityairrequest.meis.af.mil/2.0.0';
//ns2:addMobilityAirRequestResponse[1]/ns2:MethodResponse[1]/ns2:TransactionResponses[1]/ns2:TransactionResponse[1]/ns2:TransactionIdentifier[1]""");

// Set the Target Test Step Name for the property transfer
transfer.setTargetStepName("Properties");
// Set the property name to transfer to.
transfer.setTargetPropertyName("TransferProperty");