Weisband, if you want the information regarding the work I have done it is all on this forum. Here goes the links:
How to replace all of your '?' with null values:
http://forum.soapui.org/viewtopic.php?f=14&t=22913&sid=4c812a70c0a62f40ba8d240a851cc858How to build a SoapUI project using Java with values from an external source:
http://forum.soapui.org/viewtopic.php?f=5&t=22797&sid=4c812a70c0a62f40ba8d240a851cc858How to add all parameters into a SoapUI project using an external source utilizing groovy script:
http://forum.soapui.org/viewtopic.php?f=5&t=22445&sid=4c812a70c0a62f40ba8d240a851cc858(Note, this one replaces your UI with a new one, it needs work but it does do a good job, just looks bad and if your assertions are not set up correctly it will not work that well for you).
You could always just use properties too if you want something more simplistic.