Win7PE

[Synapse Systems]

Hi everybody, i'm searching for a downlodable copy of win7PE to have the ability to work with d7 offline in the system with vista/7/8 installed. I've made one that start but don't work because don't recognize attached usb drive, look for all driver of the machine (like a fresh install).
Can somebody tell me where i can find a complete win7PE?
Sorry for my bad english and thanks in advance.
Bye

[Cybercrypt]

Here is a how to.. to make your own from YOUR Licensed copies of Win7..
http://www.irongeek.com/i.php?page=security/winbuilder-win7pe-se-tutorial