the js_karmahotel also " modify the MIRC.INI and store its contents in a WINAMOD.DAT file in the Hard Drive C:\. It then enables a hacker access to the infected system when the infected user connects to an MIRC channel."
I deleted your url links, as Poppy said, they may be infected. Realize that the only way someone could send this to you "without your knowledge" is if you have autoget on in your dcc options. If you click on an infected url, open an email attachment (altho now with some all you need do is open the blasted email), accept a file (or set autoget on) you are at risk. Security patch? yep.. dont do the above. keep your virus scanner up to date. keep up with windows updates. this web page
has lots of good tips for helping you secure your puter.
Glad you got yours cleaned