Thel BCDW 1.50Z pages will open in a new window.
You can find the original page here, but it is no longer maintained. In the downloads section you'll find the entire 1.50Z pages for download in archives.
If you want to use BCDW 1.50Z with Windows XP SP2 or a BartPE based on it, you will have to use this file instead of setupldr.bin of XP SP2. As this is a personal workaround, there is no warranty coming with it, try at your own risk.
BCDW 2.0 basic documentation can be found in the FAQ section.