1. You can use it as many times as you want its all included with you LANDESK license far as I know.
2. See if this document helps https://help.landesk.com/Help/enu/ldms/9.0/Content/Windows/osd_app.htm and you can scroll to Using IMAGEW version 1 and in that it has "To create an uncompressed image to a file" and "To create a compressed image to a CD drive" and "To create an uncompressed image to a CD drive". The thought is that you can swap CD or File with the USB drive letter. Now you can run the Imagew.exe program manually from WINPE and walk thru the document in the link I sent in the first post (ImageW command lines (ifw_en_manual).pdf) You will need to open boot.wim and copy the imagew.exe or the whole imgtools folder in WINPE in Windows\System32.