I was poking around after installing the Windows Server 2003 Resource Kit Tools and noticed that it installed a little app called dvdburn.exe. It does just what you would expect: burn a DVD ISO to disc (I'm actually using it on XP MCE). It also includes the related cdburn.exe. I'm also a fan of cmdhere.inf (right click, choose install). It lets you right click on any folder and open a command prompt to that directory. And let's not forget robocopy.exe! So there you go: some nice little free utilities from Microsoft.