rawr_previewbox.js is in rawr_default folder.
The error you are getting probably because of not setting anonymous access. Try setting anonymous access in video folder you can keep the password in root. We haven't figured out a way to make it work without setting anonymous access.
// Insert DivX
function spawnDIVXBox(target,file) {
spawnBox(target,640,380);
setTimeout("setDIVXBox(\""+target+"\",\""+file+"\");",300);
}
function setDIVXBox(target,file) {
setName(file);
gEBI(target+"Content").innerHTML = "<object classid='clsid:67DABFBF-D0AB-41fa-9C46-CC0F21721616' width=640 height=380><param name=src value=\""+file+"\"/><embed type='video/divx' src="+file+" width=640 height=380 autoplay=true/></object>";
}