Capturing and Deploying a System Image In Windows 7 Part 4: Capturing a System Image

Ok, so we have created our Windows PE disk, and we're now going to use that to capture a system image of our reference installation and then save that onto a network share.
On your reference computer you need to insert the Windows PE disk and restart the computer.
You may need to select to boot from the disk. Windows PE will start and you will see a command prompt. (These photos were taken from my phone, since I don't have the option to screenshot here!)

To capture an image of the reference installation you need to use imagex in the command line, to do this you need to type (I did have a picture of it but when I looked at my computer it hadn't come out very well :( ):

e:\imagex.exe /capture d: d:\win7.wim "Win7 Installation" /compress fast /verify

The capturing process will then start.
Once the capture is finished you can then copy the image onto a USB flash disk using the command (this is assuming your USB drive letter is F, if you're not sure what it is just type dir followed by a directory letter until you find the right one):

copy d:\win7.wim f:

If you would rather save the image onto a network share you can do this by typing:

net use y: \\<server>\<share> 
copy d:\win7.wim y:

And that's it, you've now captured the image and stored it where you want it to be. You can now deploy your system image.