Dear Glen, I've been using Rocks for a couple of clusters, and now I'm about to give a try biobrew on other separate cluster. I browsed your ftp site to download the latest/stable image. However, there are different versions available including a separate roll for Rocks (v.3.1?). I was just wondering which one I should download and/or if you are planning to upload any latest/stable one on the site soon. Best, Woonki -- Woonki Chung, Ph.D. Systems Analyst Advanced Research Computing 501A Reiss Science Building Georgetown University Washington, DC 20057-0995 Phone: (202) 687-5983 Fax: (202) 687-2087