Consuming Web Services

I have been asked to write a client application for consuming a web service for a cms written in ASP 3.0. I have very little experience of developing on a microsoft platform, and very basic skills in ASP. I am a java programmer by trade, and have used java for achieving the same thing in the past.

I have done some research on the subject, and am a little unsure on what is involved in developing the above. The
web service simply returns and xml document as a String, based upon 2 parameters, these are both also strings.

I understand I need to utilise the SOAP toolkit, and have downloaded version 3. Is it feasible for me to be able to develop a very basic client application within a few days or is it much more involved?