What information you looking for. I've played with it a little, but then found that for my needs the Ultimate Boot CD for Windows was more what I was looking for and quit further work on the Microsoft WinPE.

Univeral Boot CD for Windows
http://www.ubcd4win.com/

I used to use this method before I ran into the UBCD above.

Universal TCP/IP Network Bootdisk
http://www.netbootdisk.com/
 
What is it you're specifically looking to do?