Isobuster extracts a .img file - your burning app.will probably happily pick that up.
EDIT : Vlite is probably easiest method. Browse to the windows files, click Bootable .iso , create image
These are the hashes ( it is a Vista .iso I have used here )
File: etfsboot.com
CRC-32: 7dad4ab5
MD4: a2e8717bfcfdc393a2ca86d895824755
MD5: 8e64dfb5944e55b8a200686037925bf6
SHA-1: 59fb660aad506285e69f34769acf57e9e3a4952c
File: bootimg.bif
CRC-32: 7dad4ab5
MD4: a2e8717bfcfdc393a2ca86d895824755
MD5: 8e64dfb5944e55b8a200686037925bf6
SHA-1: 59fb660aad506285e69f34769acf57e9e3a4952c
File: Microsoft Corporation.img
CRC-32: 7dad4ab5
MD4: a2e8717bfcfdc393a2ca86d895824755
MD5: 8e64dfb5944e55b8a200686037925bf6
SHA-1: 59fb660aad506285e69f34769acf57e9e3a4952c