I have a number of legacy VBScript files that I want to bring under test harness, they mostly deal with lower level system functions (deleting old cache data etc.). I've looked into using http://www.xt1.org/scriptunit, but I'm very new to Visual Basic (most of my testing experience lies in shunit for bash scripting and mocha for Ruby), and was a little disappointed that Script Unit hasn't been worked on for over 7 years and there doesn't seem to be much/any community support for it.
We're also looking for open-source/free solutions, though I know this is more difficult to find in this situation.
Any suggestions of tools/technologies for VBScript test harnessing would be most welcome.