haha, i dont think he's a computer genius either, but back on topic. He musn't of read the installer carfully. If he did he would have noticed that it's not an install agreement, but a sponsor program agreement. Meaning that it wasnt asking your permission to install Messenger Plus!, it was asking you to install Msgplus!'s sponsor program from C2media. On instructions on how to remove it from patchou himself, please read the thread located at :
http://shoutbox.menthix.net/showthread.php?tid=21598
Edit: Plus shouldn't get called or recognized as spyware/adware because it's really it's sponsor that gives you those impressions. So no, Plus! wont get your credit card numbers etc.