I have a remote data center with several headless Mac Minis running Photoshop jobs on images. We need to upgrade some of our filters and other components and the requirements mean we need to do a OS upgrade from 10.5 to 10.6. Is this something that can be done remotely using ARD? I've read a few posts about the Xserve having ARD support for similar upgrades, but I haven't been able to find anything referencing a non-server OS upgrade being done this way. If it weren't for the 24/7 operation of the PS jobs I'd copy the DMG and follow the steps outlined for the Xserve. However, I can't risk the upgrade not working and us losing access to 1 of 5 systems for several days before we can have someone onsite to do the upgrade manually.