From my experience, keeping your system clean will have you much more performance gain than removing as much as you can with nLite. You cannot compare a system that's running full XP since a year with tons of installed programs and a fresh nLited XP, of course there is no comparaison. But a fresh standard XP and nLited? Not much difference (I'm NOT talking "install time" here). Boot time is decreased by tweaking your BIOS as well. Performance by loading only what you need, keeping programs from "automatically update trough the Internet", having the good drivers, defrag regularly, use an antivirus that doesn't eat all your CPU time, turn off bells and wistles, clean your temp, etc. Not by removing notepad then have to reinstall Windows because you actually needed it. Unless installing on very weak hardware, getting rid of everything is not an achievement IMHO. It's been said time and time again, people should only remove what they are sure they will never use/need. The forum is full of people doing the opposite and asking for help.