the drive plus the enclosure is named DVR-X152, do you happen to know what drive is internal? could it be a DVR-1910/115?
i do not see support for the DVR-X152 in MCSE so that wont help.
i know that ImgBurn will automatically booktype if the media/drive/firmware supports bitsetting. try burning with ImgBurn, there is a line in the burn log which will look like this if your drive doesnot support it:
[B]Book Type Setting: N/A[/B]
if you can figure out what internal version your drive is you might be able to connect it internal do a MCSE flash then put it back in the enclosure. unless you have a laptop, then you might need to find a friend to help you.