How can I write tests for web services (in C#) outside of the Solution they exist in?

How can I write tests for web services (in C#) outside of the Solution
they exist in?

I have been recently added to a project where I will need to be doing
functional and load testing for some existing Web Services (SOAP).
I was wondering if it is possible to call a web service from a console
application for testing purposes? I do not have permissions to code in the
existing Project so I need to create a new one, which is what my real
issue is, I do not know how to call the web services (or the web service
code) from outside of their Solution.
I know this will make things more difficult, especially for recording test
results, but I have no choice as I am a contractor and can not get the
required permissions. I can pull code and see the source code, I just
don't want to code in the existing project as my local changes will get
blown away every time there is new code to pull down.
I have done some basic testing using SoapUI, but the open Source version
does not meet all the requirements I have and would rather just write my
own tests then try and find a free 3rd party solution (as I also have no
budget).
Thanks, cwlovell13