Ouch, sounds like you are out in the real wild and woolly. Luckily, I have spent my IT career behind decent firewalls and clean loads of Windows. Corporate Symantec AV dont hurt along with Altiris Deployment Server for clean OS installs. I can agree with you about the IE users. If they don't even know that other browsers exist then they are probably not that savvy on the web. Not saying they are dumb, just blissfully ignorant.
"Iz_Not_Viruz_Iz_Rootkit" Click here dummy. Come on, click me, you know you want to. ;)