mkisofs -b <boot.img> -no-emul-boot -boot-load-seg 1984
-boot-load-size 4 -iso-level 2 -J -joliet-long -l -D
-relaxed-filenames -N -V WinXP -v -x .DS_Store -o <windows.iso> <inputDir>
where <boot.img> is the location of the .img file for windows
<windows.iso> is the location and name of the output and <inputDir> is
teh location of the input filesystem
