Free Official MSIE VM's for Linux and Mac
  LinuxVirtualBox.part1.sfx
  LinuxVirtualBox.part2.rar
  LinuxVirtualBox.part3.rar
  LinuxVirtualBox.part4.rar
  LinuxVirtualBox.part5.rar

Why? Why the proprietary rar format? I mean, is there any reason to actually use rar over even "only" xz nowadays or for big downloads, zpaq (lrzip is probably not mainstream enough I guess)? And 1000 megabyte parts? Why?