I am able to PXE boot, but when I get to the Path to store the image,
all I
see is //address/path/image.zmg.

Path is just as you see it "path". The address is the actual address
the file name is irrelevant. I have tried to use the path shown in
post: ZENworks\work\content-repo as:
but I still get the error message:

Image file path is invalid.