1. Install MSN Messenger 7.5 (If you already have it installed you don’t need to)
2. Rename the MSN Messenger folder to MSN Messenger 2 (usually located in C
rogram Files)
3. Install Windows Live Messenger.
4. Apply a polygamy patch A-Patch [
http://apatch.ikhost.com/wlm.php ] to both Messengers, or to the one you plan to open second.
5. Then change all the paths of the shortcuts to MSNM 7.5 to C: Program Files/MSN Messenger 2/msnmsgr.exe.