How can i chat with someone with an msn (or hotmail) email on aim?

its been done before but i just dont remember. any help?

How can i chat with someone with an msn (or hotmail) email on aim?
You cant , AIM uses id's , MSN uses emails , its 2 completely different types of IM
Reply:There is a program called Trillian http://www.trillian.cc/ that allows multiple IM clients in one program. However, to talk across platforms, that's a bit trickier. The easiest way to do it, would be to get a program (Trillian, or there are a few others out there) and sign up for MSN and AIM, you'd have to have both accounts, but you could use both of them through one program.