Currently it is a standalone app, you get the dialog I have a screenshot of and that's it.
In the future it will move into BetterMSN, hopefully for the next release or the one after than, anyway within a month at the very most. I may continue to maintain it as a separate program as well, depending on what people want (people - tell me what you want)
If Patchou wants it, or the source code, or any pieces from it, he is welcome to them. It is actually released under the GPL (if you want to steal the code you really should read what this does) and the source code is freely available to anyone, even competing projects - either email me, or get it off CVS at
http://sourceforge.net/projects/better-msn