Why dosent Ghost 14 support USB boot and restore?

I cant use PE as to many of my PC's only have 128mb of ram (although it works great on the ones that have enough ram).   So what other options am I looking at to get ghost USB bootable?  (and it need to be able to boot on multiple PC's (dells) made over the last 10 years)

 

And more to the point.   Why hasnt Symantec included a utility to make a USB HD or memory stick a recovery device??

 

Thank you for any help.