mkisofs creating bootable windows iso ubuntu

Hi guy's I'm desperately trying to create a virtualBox iso. I can create the iso file but when i run it in virtualbox or qemu i just get a blank screen:

Here's what i've tried so far

Quote:

mkdir ~/iso_mount sudo mount -o loop /path/to/windows.iso ~/iso_mount mkdir ~/iso_extract cp -r ~/iso_mount/* ~/iso_extract/ mkdir ~/iso_extract cp -r ~/iso_mount/* ~/iso_extract/ mkdir ~/iso_extract cp -r ~/iso_mount/* ~/iso_extract/ sudo mkisofs -o /path/to/new_bootable_windows.iso \ -b boot/etfsboot.com -no-emul-boot -boot-load-size 8 -boot-info-table \ -iso-level 4 -udf -J -l -D -N -joliet-long \ ~/iso_extract/

this creates an .iso file but i can't boot from it

i did some research and it seems like the -no-emul-boot may be the issue.
However when i omit the -no-emul-boot i get this error:

Quote:

root@yikes-a320ms2h:~/iso_extract# sudo mkisofs -o /home/yikes/Desktop/new_bootable_windows.iso \ -b boot/etfsboot.com -boot-load-size 8 -boot-info-table \ -iso-level 4 -udf -J -l -D -N -joliet-long \ ~/iso_extract/ Warning: creating filesystem that does not conform to ISO-9660. Warning: Creating ISO-9660:1999 (version 2) filesystem. Warning: ISO-9660 filenames longer than 31 may cause buffer overflows in the OS. Warning: creating filesystem with Joliet extensions but without Rock Ridge extensions. It is highly recommended to add Rock Ridge. Size of boot image is 8 sectors -> genisoimage: Error - boot image '/root/iso_extract/boot/etfsboot.com' has not an allowable size. root@yikes-a320ms2h:~/iso_extract#

Obviously i'm doing something wrong, anyone have any clue as to how i can resolve this issue?