An MD5Sum is a digital "fingerprint" that identifies a file. If you're download was no good then the hash wouldn't match. Most OS have MD5 check methods built in except windows. There is a concise walkthrough on the ubuntu.com page. Just search MD5. If you need a Windows based check, search for MD5Sum. Top result should be a link to Nullriver Software. There is a free simple checksum at that link.

Even if your check is good, you could still have a bad burn. I had this with my first install attempt and ended up being my burner. Even burning at the lowest speed resulted in errors. Assume there was something wrong with the calibration of the drive, but long story short, burn finished good, install failed, new drive, new burn, good install.

Sorry I can't help you with you're VMWare problem.