I experienced problem with updating XRefs scenes during main scene load. I can hit "Update Now" button on workstation but I can't do this during renderfarm rendering. This script forces XRefs update during main scene load. It should be installed on every single render node. I expreienced this problem at 3ds Max ver 9, script was tested on ver. 2009 also (will propably work at v. 2008). Problem disappeared at 3dsMax 2010.