If it happens not to be autodetected never fear.
Load up your console and type 'netcardconfig' and hit enter, and configure it manually. It's easy
I Think you mean AIM m8. If not, don't read further.
THere is an official AIM client for linux www.aim.com
but the preferred IM program that suparts oscar, TOC, yahoo, MSN, and Jabber all in one is GAIM http://gaim.sourceforge.net