Hi, I just completed a project and noticed that I had used up a lot of hard drive space, namely an incremental 12 GB over that of the source files. I looked around and found, in the Sony subfolder under Application Data, a bunch of 38 MB avi files called "Vegas Movie Studio Prerendered Video File". I don't know what caused these to be created, or whether they are always created when rendering. Could anyone please shed light on this? Thanks.