Please visit https://www.adobe.com/cfusion/entitlement/index.cfm?e=lces2_sp to download Service Pack 1. Additional details on the contents of the service pack, including the issues it addresses and installation instructions are included in the Read Me file available at the same URL. A file extraction utility such as WinZip/gnu tar/unzip will be required in order to extract the files prior to running the installation.
The direct link to the Service Pack download is http://www.adobe.com/cfusion/entitlement/index.cfm?e=lces2_sp.
You can also access the download from a few locations on LiveCycle DevNet pages:
1. Downloads tab: http://www.adobe.com/devnet/livecycle/index.html?view=downloads
2. Get It section on the Get Started page: http://www.adobe.com/devnet/livecycle/get_started.html
Be sure to review the Release Notes
Release notes: http://help.adobe.com/en_US/livecycle/9.0/releasenotes.html
Read Me: http://download.adobe.com/pub/adobe/magic/livecycle/lces2_sp1/designer/sp_download_readme.pdf