One thing imho rF2 does better then any sim is windowed mode.
Set full screen windowed ( tick box in rF config ) been telling people for nigh on 2 years.
I know what you thinking, windowed mode ughh right but you be wrong.
rF2 you can't tell it is windowed, ie: most other sims you see the border.
It also has no affect on performance or fps or causes stutter or anything else like it does in some sims.
Now all you need to do is press the Win Key and you have task bar and start-menu and anything multitasking on top of rF2.
So say you are lapping, you can hit Win Key, open any program, do what you like ......while you are still lapping ! , why would you use Alt-Tab is beyond me.
It works faster and smoother and if you do alot of alt-tabs you can sometimes get lockups ctd all sorts of things ..........from time to time ........on occasion.