Well it's good to know I'm not the only one wondering about this.
I'm using Maxthon which is an IE wrapper however every other program I have works fine with it. MSN doesn't. It's defined as my default browser, in the 'Set Program Access and Defaults' it's set to use my own browser. I even have it set as the 'Internet' default in the start menu properties.
Guess we'll have to just wait a little longer for this feature. So although it's annoying, it's hot a huge deal. I still have tons of other features to play around with in MsgPlus and the StuffPlug plugins. Thanks!