Sliding thru different screens while keeping apps/webpages open?

[mamabear71]

Is there any way to slide between screens while keeping my yahoo email, instant messaging, etc open. Instead of having to click on the home key and choosing the individual app?
I've chosen the social scene in my settings because it leaves a page open for IM & email but I'm wondering if its possible to customize a NONrooted phone to keep more "pages/screens" open, like facebook kept open or the web browser?

 

[Joehunni]

As long as you aren't using a task killer, which you shouldn't be, you can hold down the home key which lets you switch between your 6 most recently used apps.