The current Windows image takes at least a 6 Gig drive, but you can remove some of the images to make it smaller. For example I have four images that I can put on a Road Warrior so that it can make other Road Warriors:
The reason for creating RW3 and RW2 is that some applications only have one image that they always use (and Child 1-6 is our most popular image). One of them could be installed on a larger HD for a project that had its own images that it liked to use, and did not want mine.
Child16 image is about 570meg
Senior image is about 520 meg
Net image is about 740 meg
The Refurb folder (which is required to implement Customize Software) is over 1 Gig
Before Net image, Coyote image, and Customize Software was added the image would fit on a 4 gig drive
Before Customize Software was added it was possible to fit Road Warrior with its driver search capability and Windows, plus the Child16 image, on a 2 Gig drive, and if we dropped Windows it fit on a 1 Gig drive.