first, some background:
I used img burn fine a few days ago.
Today I tried using nlite according to this guide: http://www.howtogeek.com/howto/windows/resolving-setup-did-not-find-any-hard-disk-drives-during-windows-xp-installation/
For whatever reason, that was not successful. (I had a windows XP install CD in drive E. Then after unsuccessfully running nlite, my computer no longer recognized the install CD in drive E).
Today, when I try running img burn, it always stalls when it comes to the step "searching for SCSI / ATAPI devices"
I'm not entirely sure that the two problems are related, but I think they may be.