Its as simple as making use of a USB flash drive which is said to reduce installation time to less then 10 minutes. To make the process even quicker, bit-tech have also hyperlinked to the "Windows Automated Installation Kit" which allows for the installation to automatically enter any field information during the installation process which you would otherwise have to be there to do manually.
One of the problems that many enthusiasts have encountered with Windows is its incredibly slow installation procedures. Due to the nature of XP in particular, a full install can be quite a tedious, lengthy task. We've noted that Vista installs considerably quicker (roughly 30 minutes instead of 1-1.5 hours), but how much faster could it get? A lot, apparently.
One website has found that it is actually very possible to boot a Vista install off of a USB stick, much like Linux has been able to do for ages. This is wonderful for anyone who is likely to install more than one copy, but it comes with an added bonus. Apparently, installing from a DVD is way slower - a Vista install can be done from USB in under 10 minutes. The slowest part becomes the user-entered data, which also has a solution.