well, broadly....just remove unnecessary drivers and programs. Do you need Windows Media player? Do you need Internet Explorer? (You can use Firefox instead). Don't remove the IE core, lots of stuff relies on it. Do you need Windows Update (with a Firewall and good Anti-Virus, you probably would be fine). Just remove anything you think you won't need. You could remove joystick drivers if you won't be using one (you can download them later). You probably don't need IIS. You could remove some of the wizards. It's not hard to choose what you won't need. I've gotten my installation to 300.21MB and it has Firefox, VLC Media player, uTorrent, Office 2003, the IE core, IE7, WinRAR, 7zip, notepad2, notepad++, AVG, spybot, xfire, Gaim, and Windows Media Player. I didn't remove Paint, notepad, or Calculator. Good luck