Need info for ALGs

hi,

I'd appreciate if someone can give me information or pointers to the
sources of information on the following ALGs.. MSN, AOL, yahoo
messenger & ICQ.
I'm trying to come up with some test cases for testing these ALGs in a
home gateway network. But I lack information on the workings of the
above services.
I could get information related to ALGs like FTP, ICMP etc from RFCs.
But I'm unable to find any information on these. Any help will be
greatly appreciated.


Thanks in advance,
Revathi