I think the majority was done by a custom template and CSS. The parts are sections different grouping that the template shows, would not be surprised if there was custom php and mysql behind it. For the menu's they use http://community.invisionpower.com/files/file/5435-promenu-basic/.
thanks for reply. I'm afraid to buy ipboard and ipcontent. I first have to know if it is a change that I can do. I Dont find online tutorial or guide.
Yes that layout can be created. It will take some work to do, but, like we_are_borg says it is possible.
Its hard skinnin for IPB is not easy and IPB 4 is being written as we speak skinning for that version is going to be easier. Also for the best layouts you need to know a little php so you can copy past stuff.