Ok. First, gghornet, ShadowFireRaven is asking for help on MACINTOSH platform. The two links you gave have Windows only software.

Second, one piece of advice that gghornet gave was sound: find the file that is keylogginer. Shouldn't be that hard depending on whether it's OS X or OS 9 (or earlier). If you give that info, should help. There are only a handful of mac keyloggers.

Lastly, this site should help in getting some good virus scan and firewalls in place as well as file system locking software. If you need any further help, let me know. I run at home Windows, Linux and Macintosh (OS X and OS 9) so usually I can find something to answer something.

As I was looking at Secure Mac the following might be of help:

http://www.securemac.com/keysoff.php
http://www.securemac.com/startupsecurity.php
http://www.symantec.com/nav/nav_mac/ <-- Virex used to be the premier mac AV software but I think McAfee bought them out. Think I can find the mac version? nope.
http://www.securemac.com/netbarrier.php

One other thing maybe to visit Freaks Macintosh Archive. By far this is the largest collection of Mac hacks I've ever seen and it might give you an idea of what tools he is using.

Hope that helps.