Whenever you Add/Remove Windows components or occasionally when you install a program you get prompted to insert your Windows CD. This can get pretty annoying, as you have to find the install CD, dust it off, and then resume your installation. Avoid this by copying the Windows source files (on your CD, it is the folder D:\i386) to your hard drive (I usually put them in C:\Windows\i386). Now whenever you are prompted to insert your CD, just browse to the location where you copied the source files, no need to fumble for the CD anymore.