I would seriously recommend CloneZilla, which is open source.
We've dumped Ghost and have been using this to image all of our new machines. It can either be used as a Live CD using a USB drive for a handful of machines or using a Linux server and the DRBL option, it can be used just like Ghost Corporate, multicasting out toa stack of machines.
You can get it from http://clonezilla.sourceforge.net/
Cheers, MisterTrimble