Hi,
I'm not sure what you mean. To achieve the effect of the page you're linking to you have to create a dynamic template as Dude suggests. For the portfolio to "slide" all you need to do is set it to display on current page.
Here's a quick screencast that could help explain the settings: http://screencast.com/t/8PSCmhdA3sE
The part below these portfolio items is added by adding a Page element, he includes a page with following content:
[hr]
[one_fourth first]<h3>Title</h3>[dropcap2]1[/dropcap2]Cogna consequat consequat consectetur, arcu seat ligula elit sed meseqcipit lorem, pulvinar consequaagna consequat consequat consectetur, arcu sem suscipit lorem[/one_fourth]
[one_fourth]<h3>Title</h3>[dropcap3]2[/dropcap3]Consequat consequat consectetur, arcu seat ligula elit sed meseqcipit lorem, pulvinar consequaagna consequat consequat consectetur, arcu sem suscipit lorem[/one_fourth]
[one_fourth]<h3>Title</h3>[dropcap3]3[/dropcap3]Consequat consequat consectetur, arcu seat ligula elit sed meseqcipit lorem, pulvinar consequaagna consequat consequat consectetur, arcu sem suscipit lorem[/one_fourth]
[one_fourth]<h3>Title</h3>[dropcap3]4[/dropcap3]Consequat consequat consectetur, arcu seat ligula elit sed meseqcipit lorem, pulvinar consequaagna consequat consequat consectetur, arcu sem suscipit lorem[/one_fourth]
You can paste that content in through HTML view when creating a post.
Cheers,
Chris