Vincepettit, just figured I would give you a further heads up on something I have found of use, when people here ignore your posts...
A program called Komodo Edit, from Active State, if you use Windows... (I think there is a Linux and Mac version, but I don't recall...) It's a free tool, that does very nice for coding most languages, with color coding, etc... There are probably a number of others that will do the same in terms of the search function I use alot, but given I have ActiveState's Perl, and TCL on my system as well, it just made sense to use Komodo Edit to boot...
http://www.activestate.com/komodo_edit
It has a very nice feature that let's me specify the top of a stock copy of Word Press, search through the entire directory tree for it, for key bits of code, such as in your case, grab the DB key for Yahoo Messenger, and do a search for it, you will find where it gets, added, etc... From there you should be able to find most of the code you need to replicate, and just tweak to collect, then output what you want. That's how I found the password code and such I needed... Will be doing the profile stuff soon, (had to re-do how my new plugin worked), so I am playing a bit of catch up at the moment...