I’m trying to figure out if there is a rule of thumb in guessing the final install size of a Windows XP Pro install based off the size of the ISO file that nLite creates. For example, if my ISO files that nLite creates is 500MB, it is a good guess that the final install size will be 1GB. I’m trying to see if there is a ratio I can use to ballpark a good guess. Thanks for your time in advance. Dan