If your Windjammer is like mine was and doesn't have a lock on the bathroom doorknob, it is a breeze to change. I have located the exact match to the doorknobs used with a lock on Amazon. It took me about three minutes to swap out. Here is the information if you are interested:
Stainless steel privacy lock set
Manufacturer: AP Products
Model number: 013-02-SS
Link to doorknob at Amazon: http://www.amazon.com/Products-013-2...rds=013-202-ss
All you have to do is swap the knobs, leaving everything else the way it is. It is really that simple.