So one of my favorite features of firefox is that I can type a ? in the address bar and it brings me straight to google. (aka type address of ? and press enter)

I have to use IE at work and would like to find a way to make ? go to google aswell. I've toyed with the host file but had no luck. Any ideas?

Have a look at this:

http://www.google.co.uk/options/defaults.html

Probably the section "Make Google Your Default Search Engine"