Almost two years ago I wrote a post on the location of the BizTalk Adapters for BizTalk 2010. For BizTalk 2010 there are basically two folders both containing a setup application. One folder contains the setup for installation of BizTalk, RFID and Adapter Pack. The other folder contains a setup for BizTalk accelerators. This is a little bit different for BizTalk Server 2013 Beta.
In case you download BizTalk2013Beta.exe from the Download Center you will have a folder named for instance BizTalk2013beta (depending how you named the folder when unpacking the media). When you run the setup in that folder you can install BizTalk, UDDI Services, RFID, BizTalk Adapters and ESB Toolkit.
For BizTalk Server 2013 Beta itself there is documentation available for installation (divers Operating Systems), and the product itself.
In case you download BizTalk2013AcceleratorsBeta.exe from the Download Center you will have a folder for instance called BizTalk2013AcceleratorsBeta (depending how you named the folder when unpacking the media).
Within this folder you will also find the installation guide for the accelerators.
In case you download HIS2013BETA.exe from the Download Center you will have a folder for instance called HIS2013Beta (depending how you named the folder when unpacking the media).
You have installation guide and installation links for your usage.
BizTalk Server 2013 beta is in my view an improvement from an installation and configuration perspective. There a now loose ends as in separate downloads for additional features like adapter pack or ESB Toolkit. Everything is on the media and for the accelerators or HIS there is a separate download, available through same location on the Download Center.