A while back, I spent a long time looking for a good program to mount .iso files. Finding a good one for free that doesn’t mess up my Vista installation (had some problems with Daemon Tools in the past) was difficult, but then I came across Virtual CloneDrive by SlySoft which has no fancy features and does only what it promises to do, without error. I highly recommend this, it’s how I installed Wubi from the .iso of Ubuntu. So the next time you need to mount an .iso file and don’t want to waste a CD-R, remember Virtual CloneDrive.