I installed it as a Windows 98 application. The installation program must have something CrossOver doesn't nkow how to handle because the installation process actually returns a message saying something wient wrong ("application has exited"). However, when testing on known IE-specific pages, it works extremely well; even on pages that are just containers for huge UI applets.
So, aside from the installation process not being 100% clean, I'd say you guys should raise the status of this application at least to Bronze.