I know there was some install you could do so you could do "live" css editing of a webpage within IE (much like the web developer extension for Firefox) I've since lost the link (feel free to post it in the comments if you have any idea what I'm talking about! LOL) but for some reason I could never get it to work. I gave up for a time, but last night I was working on something that, of course, worked just fine in Firefox, but IE was doing something completely different and I couldn't figure out why. So I went looking again. What I found: CSS Vista. Lets you edit the css of webpages and see your changes live on the screen… AND what I really like about it is that it has two preview panes – one for firefox and one for IE – so you can see if what you're doing is going to be changing something in one browser and not the other.
This isn't terribly new – I guess the program has been out for awhile. I wish I had known about it sooner. Would have saved me a bunch of headaches!