Just install the Windows Desktop Search/MSN toolbar. However, one caveat, disable all searches and advanced features. If you don't, the Windows Desktop Search will slow the performance down on your computer.
(This is probably Microsoft's answer to the Google desktop search but Google doesn't offer tabs on their product. )
Last step, click on View > Toolbars > MSN Search Toolbar. You will now have tabbed browsing without the Desktop search issues. The tabbed browsing in IE does not work as seamlessly as Firefox/Netscape/Mozilla, but it is a plus for those who prefer the IE browser.