If you need to use IE for testing a webpage, you don't have to install
Windows just for that ;)
PlayOnLinux is a really cool program, that acts as a frontend for Wine. You
just browse the application list of PlayOnLinux, choose the IE version you
need, and it installs everything automatically!
1. It gets the Wine version most compatible with the application you want to
use.
2. It sets up all the registry hacks that are needed in order to make a not
well supported application work.
3. In case of IE PlayOnLinux downloads the correct IE version during
installation process.
I dare saying, it's easier to install IE on PlayOnLinux than on Windows
itself, where (in case of an older IE version) you will have to search the
Internet yourself for an installer.
Of course, if you need Windows for games, thats another story. But,
PlayOnLinux is quite helpful in that regard as well!