Yes MSN seems something of a memory hog, esp when compared to Plus. I'll make this known to my friend. The real hogs on my system are Firebird (I still love it!), and my firewall, which use circa 30Mb each!
I can't see Plus impacting on performance. It uses seemingly no processing power, and not much memory. I doubt startup times would dramatically increase after Plus is installed.
So thats another pat on the back for you Patchou!