background loading

I have a media server patch that I use for shows and I am running multiple projectors at HD resolutions. I tend to use loadram when loading content because I prefer the responsiveness of the RAM as opposed to the performance I get from the disk. While content is being played on one machine, is there a workaround for the temporary lockup that happens while loading another file into RAM of another matrix or qt object on the same machine. In the past I have just used more than one computer if I needed to load video while playing video. If I am loading video while playing a still image its fine for obvious reasons. In the case of complex shows, its not practical to load every cue into RAM at the top of show because it would be like 40 gigs. Is a multi machine network the only way to dynamically load content while another video is running? It would be awesome to be able to dynamically load on one machine considering I can run 15 outputs on one rack server but I still have to use another machine just to get a truly independent second layer.