Erm there i one way out. Make a text file with .ctt as extension.
code:
<?xml version="1.0"?>
<messenger>
<service name=".NET Messenger Service">
<contactlist>
<contact type="32">yahooid@yahoo.com</contact>
<contact type="1">windowsliveid@domain.com</contact>
</contactlist>
</service>
</messenger>
Make Such a file with all your contacts and then in Messenger go to
Contacts > Import Instant Messaging Contacts... and browse to the ctt file you made and your done
.