Patchou wouldn't write a widely spread illegal program, so unless he buys a license from MS to use the MSN-network/protocol, he can't use the MSN-network in his messenger and thus needs to set up a different network. And thus I can't contact my friends who use MSN Messenger anymore, and thus: no
If he will buy the license, (and this means we will pay for it also) then maybe. It depends on how good it is
all hypothetic of course