Check it out! - http://www.ncnblue.com/wlmportable/
I've just compiled a portable version of Windows Live Messenger which can be run from a USB Key or Memory Stick.
No installation required. No administrator privileges required. Just launch from the single EXE file and your set to go.
Portable Windows Live Messenger 2009 (Build 14.0.8089.726)
http://www.ncnblue.com/wlmportable/Windows%20Live%20Messenger%2014.0.exe
Portable Windows Live Messenger 8.5 (Build 8.5.1302.1018)
http://www.ncnblue.com/wlmportable/Windows%20Live%20Messenger%208.5.exe
I changed the build string for WLM 8.5 to re-enable the ability to sign in ... as Microsoft blocked all 2007 and 2008 versions of MSN last month.
