Hey emr,
First, if it hasn't been said, Welcome to the forum!
To generalize, most PWS use different protocol to display their data. Even different models of the same brand. I do not own an Oregon WMR200 so I can't be specific. I would suggest starting a thread asking owners of your PWS what software they use and why. Most PWS will only support one software program at a time so you will probably have to choose either/or. Virtual Weather Station is a very popular software that supports a wide range of PWS and is easy to use. Weather Display is more complex and has a steep learning curve, but it is probably the best supported of the weather softwares. I have found a new program, Cumulus, that I like but I don't know for sure it supports your PWS. There are several more programs that I'm not familiar with, some of which may have been written specifically for your PWS.
Good Luck, Take your time, and HAVE FUN!
George