Using user.name as part of test output dir?

All,

I'm using SoapUI 4.5.1.

I have production checkout smoke tests that various people run. I want to make the test output go to somewhere under the user's Windows 7 home directory. Is it possible to somehow specify the java system property user.name as part of the output path? When I run the tests, I right click the test suite and select "Launch Test Runner." It's the Root Folder input box of the Reports tab where I want to specify user.name. Putting ${user.name} in there doesn't work.

thanks