in reply to
Adding Tests to Mature Web App
you could have a look at iopus internet macros.
it's primitive, not perl, not free, but easy to get started with: it's basically an automation tool for Internet Explorer, like word macros are for Word....
it does interface ok with the windows shell scripting tool.
if you have some interns sitting around the office with lots of time but little experience, you could give them this program to start recording click scripts, and at least this would give you a basis for turning things into more structured type tests with perl later.