Naz, AIM screen name means AOL Instant Messenger screen name. You need to have and AOL account to have one. (Welcome to AOL UK)
ICQ number, you also need to have ICQ to have one. ICQ is the oldest instant messenger in the land, download it from ICQ.com - community, people search and messaging service!

Thanks

lol, that you for your help.

I think i'll stick to Yahoo and MSN otherwise you'll get me talking about the old days, lol.