The basic steps are the same steps in any methodology. Just ask yourself these questions:
What has to be tested?
What can and should be tested?
What are the risks of not testing individual entities?
Those and other questions are generally found at the top of the heap in any testing effort. Does the organization want to fund the project, and drill down to the task and planning levels to get the questions answered?
I suggest that you look for some white papers - try www.stickyminds.com and some books - I do not know any without research but I am sure that you can find something at Amazon or Barnes and Noble on the subject. You could also try searching this forum for recommendation for books on Agile.
While the basic steps are same the way you approach them may be different.
I have not failed. I've just found 10,000 ways that won't work" --Thomas Edison