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!