One of the reasons why I use Firefox, is Tabbed Windows.
I was looking at programs that may exist to give Tabbed Windows to IE, and I came across via the Microsoft Web site (Yes, really), this. Plus its free!Advanced Browser
I am trying it at present, and so far it is looking good.
Ahh, the joys of Tabbed Windows...
It also has a setting to prevent flash animations from being downloaded, so that should help the speed of web pages being downloaded, and displayed.