Testing secure MQ using "Web Services" license

I have to test MQ and it has certificate authentication enabled. And that is causing me a headache.
The problem is that I have only "Web Services" license. Basically meaning that we don't have Java Vuser license.
I've managed to send messages to MQ when security is turned off, but we need to test how will the application work when security is on.

I know that with Java Vuser isn't problem. So, I would like to know is this even possible to do with WS Vuser?

Thanks.
//sute