In addition to the SP1 installation program, a document called the SP1 Guide is available for download on this page. This document contains important information to read before you install SP1. It also provides installation instructions and a section on troubleshooting installation problems. Finally, it contains a section on known issues in this service pack release. To install BizTalk Server 2006 R2 SP1, download the SP1 Guide and follow the instructions in it.