I accidently deleted a contact from my msn messenger.

i try to re add the same contact but it says that i can't add them again because i already have it.

so i look at the bottom of my msn group and there is a group that says non-instant messaging contacts and in it is the group of msn contacts i have deleted. I tried to move them back into my group but it doesn't work.

anyone know how i can add them again?

I don't use MSN Messenger at all. Having said that, a quick Google search led me to:

http://www.msngeeks.com/index.php?page=listrebuilder

which might be the right tool for doing what you need to do, and the right site for sorting out assorted MSN Messenger problems.

try having them message you and see what pops up. usually you can add someone when they message you too. drop them an email and tell them to message you. Otherwise, I don't know.