I believe both my 1620 and 1640 came with Bit Setting enabled and set to DVD-ROM by default. Isn't that the case with everyone else's drives?
Nero 6.6.x.x seems to handle the Bit Setting feature with no sweat. I don't need any other utility. I just open Nero, go to the RECORDER menu, select CHOOSE RECORDER, click on the OPTIONS button and BOOK TYPE SETTINGS is listed right there at the bottom with a pop-down list box. Very convenient.