This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I'm probably about to step into something, but you can have conditional comments in IE, like:
Into that you could define styles or link to a style sheet specific to IE 7 to override styles meant for a standards-based browser. It would look like a comment to any other browser, so would be ignored. However, tricking various versions of IE into rendering things consistently is a complex art form, and I'm just a novice.