in short: No....
The toppost was posted more then a month ago and this thread has been one of the top threads since then (because of the many bumps
). But the actual request for saving the webcam in MSN Messenger is very old (think in terms of
years!).
By now, some plugin developer already have seen this and if interested he/she would have made the plugin. Every plugin developer knows about this request already.
This plugin is far from easy to make, as said multiple times already, and is almost out of scope of most plugin developers.
It is of no use to keep requesting this and bumping this thread.
So, sorry to burst the bubble, but it is NOT going to be made.
If you want it that bad, then either learn how to program and make it yourself or use some of the tools listed here:
"
Capturing WebCam Video in MSN Messenger 6.x"