I founded a message about controling video via ethernet here - some time ago i used g3 ibook as master and g5 2x2 as slave for video and it was so stange that video from the slave lagged up to 20-25 frames - it was sychronized in preview window, but not on the screens. I used the same "canopus dv converter" to convert video from firewire port and the same video projectors. So do You have any ideas - why it was lagged?